Sealers for Limestone Floors: Essential UK Guide

Your Comprehensive Guide to Selecting the Ideal Sealers for Limestone Flooring in the UK

• Understanding the Essential Role of Sealers in Protecting Limestone Floors: This article underscores the crucial function of sealants in safeguarding limestone flooring from stains, moisture, and everyday wear and tear, thereby ensuring both longevity and visual appeal.
• In-Depth Analysis of Various Types of Sealers Available: This segment delves into the different kinds of sealers accessible, including penetrating sealers and surface sealers, detailing their individual advantages and limitations.
• Examining the Impact of UK Climate on Limestone Floor Maintenance: A thorough exploration of how the weather conditions in the UK influence the upkeep and selection of sealers for limestone flooring.
• Proven Methods for Efficient Sealer Application: An extensive guide outlining the best practices for applying sealers to ensure long-lasting protection and optimal performance.
• Avoiding Common Pitfalls When Sealing Limestone Floors: This section highlights frequent mistakes to steer clear of when sealing limestone flooring to achieve the best outcomes.
• Trusted Brands of Sealers for Exceptional Protection: A curated list of reputable sealer brands that are consistently recommended across the UK for their reliability and effectiveness.

Maintenance Recommendations: Provides practical advice for keeping sealed limestone floors in pristine condition.

Engaging Professional Help: Advocates for consulting experts to achieve the best sealing results.

Key Considerations for Choosing Limestone Flooring

Evaluating the Porosity of Limestone and Its Influence on Flooring Decisions

Exploring the Varieties of Limestone Available in the UK and Their Unique Qualities

The UK boasts a rich array of limestone varieties, each with unique characteristics and aesthetic attributes. Prominent examples include Portland limestone, Magnesian limestone, and Cotswold limestone, all of which necessitate specific sealants to provide optimal protection. Portland limestone, recognised for its light colour and fine grain, is frequently chosen for prestigious residential and commercial projects. Although inherently durable, it still requires a robust sealer to shield it from marks caused by everyday activities. Magnesian limestone, with its darker shades, is more susceptible to weather-related damage, necessitating a sealer tailored for the UK’s humid conditions.

Cotswold limestone, renowned for its warm tones and rustic charm, is a popular choice among homeowners. Nevertheless, this variety is particularly prone to efflorescence, which manifests as white, powdery deposits when moisture escapes from the stone. Therefore, when selecting sealants for limestone floors, it is imperative for homeowners to consider the unique properties of the limestone and the environmental challenges it may encounter. Sealants featuring anti-efflorescence properties, specifically designed for Cotswold limestone, can preserve its natural allure while providing essential safeguards against deterioration.

By familiarising themselves with the various types of limestone found in the UK and their distinct sealing requirements, homeowners can make educated choices that ensure lasting protection and aesthetic value. Consulting with flooring professionals or local suppliers can significantly enhance the decision-making process.

Impact of UK Environmental Conditions on Limestone Flooring

The environmental factors present in the UK significantly impact the maintenance and preservation of limestone floors. Elements such as rainfall, humidity, and temperature fluctuations can dramatically affect the efficacy of both the limestone and the sealants applied. For instance, in regions experiencing high annual rainfall, such as the Lake District and Yorkshire Dales, the limestone’s capacity to absorb water increases the likelihood of staining and structural impairments if not properly treated with a sealer. Conversely, areas with drier climates may not face the same risks; however, temperature changes can still affect the resilience of limestone flooring.

The UK’s climate can also lead to varying degrees of wear and tear on limestone floors, particularly in outdoor settings. The freeze-thaw cycles that occur during colder months can result in cracking of the limestone, making it vital to select a flexible and durable sealer. It is essential to factor in these environmental influences when choosing sealants for limestone floors, ensuring they can withstand local conditions while providing optimal protection.

In addition to applying sealants, ongoing maintenance tailored to the UK’s unique weather patterns, such as regular cleaning during damp periods, can significantly enhance the lifespan of limestone flooring. Homeowners should consistently monitor their limestone floors and conduct regular inspections to identify any signs of damage, ensuring that the chosen sealer remains effective over time.

Proven Maintenance Strategies for Limestone Floors in the UK

Maintaining limestone floors in the UK necessitates a strategic approach that takes into account both the stone’s inherent characteristics and the environmental factors at play. Regular cleaning is crucial, as dirt and debris can become embedded in the porous surface, leading to discolouration and potential damage over time. It is advisable to utilise pH-neutral cleaners specifically formulated for limestone to avoid etching the surface. In high-traffic areas, such as hallways and kitchens, more frequent cleaning may be required to uphold the floor’s pristine appearance.

Moreover, the effectiveness of sealers diminishes over time, necessitating periodic reapplication to maintain ongoing protection. The frequency of reapplication depends on the type of sealer used and the specific limestone variety. For example, penetrating sealers typically enjoy a longer lifespan than topical sealers, which may wear down more quickly in heavily used environments. Homeowners should refer to product guidelines and carry out thorough inspections to ascertain the optimal timing for reapplication.

In the UK, understanding how seasonal changes affect limestone is equally vital. For instance, during the wet winter months, moisture can accelerate the degradation of an unsealed floor. Therefore, implementing a proactive maintenance strategy that includes routine cleaning, timely reapplication of sealers, and seasonal inspections can significantly extend the life and aesthetic appeal of limestone flooring.

Comprehensive Analysis of the Various Types of Sealers Available in the UK

Advantages of Penetrating Sealers for Limestone Flooring

Penetrating sealers are highly esteemed throughout the UK for their remarkable ability to protect limestone floors from staining while preserving the stone’s natural beauty. These sealants penetrate deeply into the limestone’s porous structure, forming a barrier against liquids without creating a film on the surface. Consequently, they effectively repel water, oil, and other contaminants, ensuring the stone’s beauty remains unblemished while preventing long-term damage.

A significant benefit of penetrating sealers is their durability. They are resilient against wear from foot traffic, with many variants lasting several years before reapplication is necessary. This longevity renders them particularly suitable for both residential and commercial properties, especially in areas subjected to heavy use. Importantly, penetrating sealers also allow the limestone to breathe, preventing moisture from becoming trapped within the stone, which is crucial given the frequently damp climate of the UK.

When selecting sealers for limestone floors, it is vital to explore the array of product formulations available in the UK. Numerous manufacturers offer penetrating sealers specifically designed for limestone, ensuring optimal protection while enhancing the stone’s visual appeal. Reviews and recommendations from local suppliers can assist homeowners in choosing the most effective product for their needs.

Topical Sealers: Enhancing the Aesthetics of Limestone Floors

Topical sealers are another popular option in the UK for safeguarding limestone floors. Unlike penetrating sealers, topical sealers create a protective film on the stone’s surface, acting as a barrier against dirt, stains, and moisture. They are particularly favoured in residential settings where visual aesthetics are paramount, as they can enhance the colour and shine of the limestone.

While topical sealers provide an attractive finish, they may require more maintenance than their penetrating counterparts. Over time, the film can wear away due to foot traffic and cleaning, necessitating periodic reapplication to sustain protective qualities. Homeowners should also be mindful that topical sealers might alter the surface texture of the limestone, potentially making it more slippery when wet—an important consideration for areas such as kitchens and bathrooms.

When selecting sealers for limestone floors in the UK, assessing the specific needs of the space is crucial. For instance, a topical sealer might be ideal for a residential living area, where aesthetics are the primary focus. Conversely, a penetrating sealer may be more suitable for high-traffic or outdoor areas, where slip resistance and durability are vital.

Enhancing Sealers: Merging Aesthetic Appeal with Effective Protection

Enhancing sealers serve a unique purpose in the protection of limestone flooring, especially in the UK. These sealers are designed to both protect the stone and enhance its natural colour and texture, allowing the limestone’s beauty to shine through in ways that other sealers may not achieve. Given the UK’s diverse landscape, many homeowners wish to accentuate the natural elegance of their limestone floors, particularly those sourced from local quarries.

Enhancing sealers can amplify depth and vibrancy in the stone, showcasing its unique patterns and characteristics. This aesthetic boost can be particularly appealing in spaces where limestone is a focal point, such as grand hallways or stylish kitchens. However, it’s crucial to note that while these sealers enhance appearance, they may not provide the same level of stain resistance as other types, necessitating careful consideration of the area’s specific requirements.

When selecting sealers for limestone floors, homeowners should balance aesthetic benefits with practical protection considerations. A trade-off may be necessary in high-traffic zones to preserve the limestone’s beauty while safeguarding it against potential damage. Consulting with professionals familiar with local climate conditions can facilitate well-informed choices.

Impregnating Sealers: Superior Protection for Limestone Flooring

Impregnating sealers represent a robust solution for protecting limestone floors in the UK, particularly in areas prone to moisture and staining. These sealers penetrate the stone’s surface, establishing a barrier that repels both water and oil-based stains while allowing the limestone to breathe. This feature is especially valuable in the UK, where high humidity and rainfall can present significant challenges for unsealed limestone.

The primary advantage of impregnating sealers is their long-lasting protection. They can remain effective for several years, even in high-traffic zones, making them a preferred option for both residential and commercial environments. Moreover, the limestone’s natural appearance remains unchanged, allowing its inherent beauty to shine through without the gloss or film that topical sealers may produce.

When selecting sealers for limestone floors, it is important to consider the specific environmental factors of the area. Impregnating sealers instil confidence in homeowners, ensuring their floors are shielded against the everyday wear and tear typical in the UK. Regular maintenance and inspections will help ensure the sealer remains effective over time, protecting against potential damage.

Strategies for Selecting the Ideal Sealer for UK Conditions

Assessing the Condition of Your Limestone Prior to Sealing

Before selecting a sealer for limestone floors, conducting a thorough evaluation of the stone’s condition is essential. Factors such as age, existing damage, and porosity significantly influence the most suitable sealer choice. Older limestone may display cracks or surface wear that could impact the performance of certain sealers. Therefore, a comprehensive inspection is necessary to identify these issues and inform the choice of sealer.

For instance, if the limestone exhibits significant wear or damage, a penetrating sealer may be more advantageous as it can fill minor cracks and provide deeper protection. Conversely, if the limestone is relatively new and well-maintained, a topical sealer could enhance its appearance while safeguarding against stains and moisture.

When selecting sealers for limestone floors, seeking professional assistance for an accurate evaluation can be beneficial. Many local flooring specialists in the UK can provide valuable insights into the specific condition of limestone and recommend suitable sealing solutions tailored to the unique needs of your flooring.

Considering the UK Climate When Choosing Sealers

The UK climate poses specific challenges for limestone flooring, making climate considerations vital when selecting a sealer. The country experiences a temperate maritime climate, characterised by wet winters and mild summers, which can lead to heightened moisture levels and potential damage to unsealed limestone. Therefore, it is crucial to choose a sealer that can withstand these environmental conditions.

For example, in regions experiencing heavy rainfall, such as the West Midlands or parts of Scotland, a penetrating sealer that permits breathability while preventing water ingress may be the most suitable option. Allowing the stone to breathe ensures that moisture can escape, minimising the risk of efflorescence and other moisture-related issues. Conversely, areas with less rainfall may offer more flexible options, including topical sealers that can enhance the stone’s appearance without compromising its integrity.

Understanding the local climate and its potential effects on limestone is critical when selecting sealers for limestone floors. Homeowners should consider how seasonal variations might impact the performance of their chosen sealer, ensuring it remains effective throughout the year.

Evaluating Usage Patterns and Traffic Levels for Optimal Sealer Selection

The levels of foot traffic in a residential or commercial space should significantly influence the decision-making process when selecting a sealer for limestone floors. High-traffic areas, such as hallways, kitchens, and living rooms, necessitate sealers designed to endure significant wear while providing optimal protection against stains and moisture. In such instances, choosing a durable penetrating or impregnating sealer is often the most prudent option.

Conversely, low-traffic areas may provide more flexibility in sealer selection. Homeowners might choose enhancing sealers that highlight the natural beauty of the limestone without the same concern for durability. Nevertheless, it remains crucial to ensure that these sealers can still protect against spills and stains, particularly in spaces where food preparation or entertaining occurs.

When selecting sealers for limestone floors, evaluating the specific usage patterns of the area is imperative. Consulting with flooring professionals can provide additional insights into the best sealing options based on anticipated traffic levels, ensuring the selected product can adequately safeguard the flooring.

Understanding the Different Types of Sealers and Their Suitability

Gaining a clear understanding of the various sealers available for limestone floors is essential for homeowners to make informed decisions based on their specific needs. Each type of sealer, whether penetrating, topical, enhancing, or impregnating, presents distinct advantages and disadvantages, particularly regarding the conditions commonly encountered in the UK.

For instance, penetrating sealers are often best suited for outdoor limestone or areas prone to spills, offering deep penetration without altering the stone’s natural look. In contrast, topical sealers may be ideal for interior spaces where visual appeal is prioritised, although they may necessitate more frequent reapplication.

Additionally, enhancing sealers can be particularly advantageous for homeowners looking to highlight the natural beauty of their limestone. However, they may not provide the same level of stain resistance as other options. Therefore, understanding the specific conditions of your limestone and its intended use is critical when selecting sealers for limestone floors.

Engaging with local experts can also assist homeowners in navigating their options, ensuring they select a sealer that is both effective and suitable for the unique characteristics of their limestone and its environment.

Essential Techniques for Applying Sealers to Limestone in the UK

Preparing Limestone Surfaces for Successful Sealer Application

Properly preparing limestone surfaces is vital for effective sealer application, especially given the unique climate conditions in the UK. Before applying any sealer, it is essential to ensure that the limestone is clean, dry, and free from contaminants. This preparation process involves sweeping or vacuuming the area, followed by damp mopping with a pH-neutral cleaner specifically designed for limestone.

If the limestone has been sealed previously, it is crucial to remove any old sealer to guarantee proper adhesion of the new application. Cleaning may require the use of a sealer stripper or professional-grade cleaning agents. In cases of significant staining or dirt accumulation, specialised limestone restoration products may be necessary to prepare a clean surface ready for sealing.

Once the surface is thoroughly prepared, it must be completely dried, as moisture can adversely affect the adhesion and effectiveness of the sealer. Given the frequently humid conditions in the UK, it may be necessary to monitor weather patterns prior to application to achieve optimal results. Homeowners should consider testing a small, inconspicuous area of the limestone first to verify compatibility with the chosen sealer.

By dedicating time and effort to the preparation stage, homeowners can significantly enhance the longevity and effectiveness of their selected sealer, thereby protecting their limestone floors against the challenges posed by the UK environment.

Best Practices for Applying Sealers to Limestone Floors

Applying sealers to limestone floors involves several methods, each with its unique advantages and considerations. The most common techniques include rolling, brushing, and spraying. For most homeowners in the UK, using a roller is often the most efficient and effective method, especially for larger areas. This technique promotes even coverage and minimises the risk of pooling or uneven application, which can compromise protection.

When using a brush, it is essential to select a high-quality, synthetic bristle brush suitable for use with sealers. This method is particularly beneficial for smaller spaces or around intricate edges and corners, ensuring that all surfaces receive adequate coverage. However, this approach can be more labour-intensive and time-consuming for larger areas.

Spraying is another popular option, especially for commercial applications or larger residential spaces. This technique allows for quick and even application; however, it requires additional equipment and expertise to prevent overspray and ensure proper ventilation. Regardless of the chosen method, users should adhere to the manufacturer’s instructions regarding the application process, including the recommended number of coats and drying times.

When selecting sealers for limestone floors, homeowners should carefully consider their application method to achieve the best results, thereby protecting their investment in high-quality flooring.

Understanding Sealer Drying and Curing Times in the UK

Comprehending the drying and curing times of sealers specific to UK conditions is crucial for optimal results. Generally, most sealers require a minimum of a few hours to dry before foot traffic is permitted, although this can vary significantly with humidity and temperature. In the UK, where humidity levels can fluctuate considerably, allowing extra time for curing is essential, particularly in areas with higher moisture levels.

For example, many impregnating sealers may require up to 24 hours to fully cure, during which time it is advisable to keep the area free from foot traffic and moisture. Topical sealers may have similar drying periods but can sometimes be sensitive to humidity, affecting their setting effectiveness.

Homeowners should also recognise that drying times can be significantly influenced by the time of year. Additional time may be necessary for sealers to cure effectively during the cooler and wetter months. Conversely, drying may occur more rapidly in warmer months, but precautions should still be taken to prevent premature exposure to cleaning or moisture.

By understanding and adhering to the recommended drying and curing times, homeowners can ensure that their limestone floors receive optimal protection, maximising the effectiveness of the chosen sealer for UK conditions.

Comprehensive Care for Sealed Limestone Floors in the UK

Implementing Consistent Cleaning Protocols for Limestone Floors

Maintaining sealed limestone floors in the UK requires a thoughtful approach to cleaning methods. Regular cleaning is essential for preserving the stone’s appearance and protecting the integrity of the applied sealer. Homeowners should aim to sweep or vacuum their floors at least once a week to eliminate dust and debris that can scratch the surface.

Alongside routine sweeping, damp mopping with a pH-neutral cleaner specifically designed for limestone is highly recommended. It is crucial to avoid acidic or abrasive cleaners, as these can damage the stone and compromise the sealer, leading to unsightly stains and increased wear. Additionally, minimising water exposure is vital, as prolonged contact can permit moisture to penetrate the stone, potentially damaging its underlying structure.

During winter, when grit and salt from the outdoors are commonly tracked indoors, more frequent cleaning may be necessary. Homeowners should also consider placing mats at entry points to reduce the amount of dirt and debris introduced onto the limestone. By adopting these cleaning practices, homeowners can maintain the beauty of their sealed limestone floors while ensuring that the sealer remains effective against stains and moisture.

Guidelines for Reapplying Sealers to Limestone Floors

Understanding when and how to reapply sealers is vital for protecting limestone floors in the UK. The frequency of reapplication can vary based on several factors, including the type of sealer utilised, the level of traffic on the flooring, and the specific environmental conditions such as humidity and temperature fluctuations.

For penetrating sealers, homeowners can generally expect to reapply every one to three years, depending on wear levels. In contrast, topical sealers may require more frequent reapplication, often every six months to a year, as they are more vulnerable to wear from foot traffic and cleaning.

When reapplying sealers, it is essential to thoroughly clean and prepare the limestone surface to ensure proper adhesion. Users should follow the manufacturer’s guidelines regarding the application process and drying times to achieve optimal outcomes. Additionally, maintaining a record of when the sealer was last applied can help ensure an effective maintenance schedule, guaranteeing that limestone floors remain protected throughout the year.

By proactively managing reapplication, homeowners can safeguard their investment and ensure that their limestone floors continue to exhibit beauty and perform well against the UK’s variable climate.

Strategies for Effectively Managing Stains and Spills on Limestone Floors

Effectively addressing stains and spills on sealed limestone floors necessitates prompt action and appropriate techniques. Despite a sealant’s protective properties, limestone remains susceptible to staining from various substances, including oil, wine, and food. Upon encountering a spill, homeowners should act quickly to minimise damage by blotting the area with a soft cloth, avoiding rubbing or scrubbing, which can exacerbate the stain.

For oil-based stains, it is advisable to use a commercial degreaser specifically formulated for limestone. Users should adhere closely to the manufacturer’s instructions and test a small, inconspicuous area first to ensure compatibility. In cases of stubborn stains, a poultice may be necessary. A poultice involves applying a thick paste of baking soda and water or specialised poultice powder to the stain, covering it with plastic wrap, and allowing it to sit for several hours or overnight. This method draws the stain out of the stone, resulting in a cleaner and less discoloured surface.

Homeowners should also be vigilant regarding the potential for efflorescence, a common issue in damp climates such as the UK, where moisture can encourage the formation of white, powdery stains on the limestone’s surface. Regular cleaning and ensuring proper drainage can help mitigate this risk. If efflorescence does occur, a solution of water and vinegar can often assist in removing the buildup. However, it is crucial to rinse thoroughly and follow up with a pH-neutral cleaner to prevent damage.

By implementing proactive cleaning habits and promptly addressing spills, homeowners can preserve the aesthetic and structural integrity of their sealed limestone floors, ensuring they remain a stunning feature of their homes for years to come.

Where to Find Quality Sealers for Limestone Floors in the UK

Exploring Local Hardware Stores for Quality Sealers

Local hardware stores throughout the UK offer a wide selection of sealers suitable for limestone floors. These establishments often stock products from reputable brands, enabling homeowners to consult knowledgeable staff for advice on the best options for their specific limestone type and conditions. By visiting a local store, customers can assess the quality of sealers firsthand and ask questions to ensure they make well-informed choices.

Many hardware stores also provide samples or testers, allowing homeowners to try a small amount of the product on their limestone before making a purchase. This can be particularly helpful in evaluating the sealer’s compatibility with the specific limestone and its effectiveness under local environmental conditions. Furthermore, local shops may carry additional products and tools needed for practical sealer application, serving as a one-stop shop for all limestone maintenance needs.

When selecting sealers for limestone floors, supporting local businesses can also strengthen community ties and contribute to the local economy, making it a rewarding choice beyond just product acquisition.

Visiting Specialty Flooring Stores for Expert Recommendations

Specialty flooring shops in the UK offer an excellent resource for homeowners seeking expert advice and a wide selection of limestone floor sealers. These retailers typically focus solely on flooring materials and maintenance products, allowing them to provide specialised knowledge that can greatly benefit customers. Staff members at these shops are often well-versed in the nuances of various sealers, enabling them to provide tailored recommendations based on the unique characteristics of different limestone types and local environmental conditions.

In addition to offering a broader selection of high-quality sealers, specialty shops may also stock complementary products such as cleaners, maintenance kits, and tools specifically designed for limestone care. This comprehensive approach simplifies the purchasing process, ensuring homeowners have everything needed to maintain their limestone floors effectively.

Moreover, many specialty flooring stores may offer workshops, demonstrations, or one-on-one consultations, providing homeowners with valuable insights into the best practices for sealing and caring for their limestone floors. By leveraging these expert resources, customers can feel confident in their purchasing decisions and ensure they select the most effective sealing solutions for their requirements.

Utilising Online Retailers for Convenient Purchases of Sealers

The rise of online shopping has transformed how homeowners can acquire sealers for limestone floors in the UK. Numerous online retailers now offer a wide variety of sealing products, making it easier than ever to find the right solutions from the comfort of home. Shopping online allows customers to compare products, read reviews, and access extensive product details that can assist in their decision-making process.

Many online retailers also offer the convenience of home delivery, which can be particularly advantageous for larger orders or for those who may have difficulty transporting heavy items. Additionally, online platforms often provide competitive pricing and occasional discounts, making it a cost-effective option for homeowners looking to save on sealing expenses.

However, it is essential to ensure that the online retailer is reputable and offers quality products. Researching customer reviews and seeking out retailers with a strong track record can help mitigate the risks associated with online shopping. When selecting sealers for limestone floors, the online shopping experience can enhance convenience while providing access to a broader range of products than may be available at local retailers.

Frequently Asked Questions Regarding Limestone Sealers

Benefits of Sealing Limestone Floors

Sealing limestone floors safeguards against stains, moisture, and deterioration, enhancing the longevity of the flooring while accentuating its natural beauty.

Recommended Frequency of Reapplication for Limestone Floor Sealers

The frequency of reapplication varies based on the type of sealer used and traffic levels; typically, penetrating sealers last between 1-3 years, while topical sealers might require reapplication every 6-12 months.

Can Any Cleaner Be Used on Sealed Limestone Floors?

No, it is vital to utilise a pH-neutral cleaner specifically designed for limestone to avoid damaging the surface and compromising the effectiveness of the sealer.

What Steps Should I Take if My Limestone Floor Becomes Stained?

Immediately blot the stain with a soft cloth, then utilise appropriate cleaning products or poultice methods to treat the stain without harming the limestone.

Are Topical Sealers Suitable for High-Traffic Areas?

Topical sealers provide a protective layer but may necessitate more frequent reapplication in high-traffic areas to maintain their effectiveness and appearance.

How Can I Determine if My Limestone Requires Resealing?

If water no longer beads on the surface or stains penetrate the stone easily, it may be time to consider resealing your limestone floors.

Is Hiring a Professional Necessary for Sealing Limestone Floors?

While DIY sealing is feasible, hiring a professional can ensure proper application techniques and optimal results, especially for larger or more complex areas.

What Characteristics Make Penetrating Sealers Ideal for Outdoor Limestone?

Penetrating sealers allow the limestone to breathe while providing deep protection against moisture and stains, making them ideal for outdoor conditions in the UK.

Can I Enhance the Colour of My Limestone?

Yes, enhancers can accentuate the natural colour and beauty of limestone while providing protection, making them a popular choice for aesthetic improvement.

Where Can I Purchase Limestone Sealers in the UK?

Limestone sealers are available at local hardware stores, specialty flooring shops, and online retailers, offering a variety of purchasing options.

This article Choosing Sealers for Limestone Floors: A UK Guide was first published on https://london-stone.co.uk