We know the importance of feeling secure in your home or business, especially with the rise in break-ins across SW London. Our anti-snap cylinder upgrades provide the protection you need, meeting top UK insurance standards. Here's how our expert team secures your property with tailored solutions that promise satisfaction. Wondering about how we achieve this level of protection for you?
Call 020 3872 0798
When moving into a new home in SW London, changing the locks is essential. We need to replace any cylinder where previous tenants, agents, or contractors may still hold working keys.
Here's why lock changes are significant:
Making sure our locks meet these needs helps keep our homes secure.

Although security is paramount, choosing the right locks that meet UK insurance standards is vital. BS3621 is the benchmark for thief-resistant mortice deadlocks, important for securing wood front doors across Battersea and Clapham Common. Meanwhile, the TS007 3-Star Kitemark is the gold standard for euro cylinders, designed to resist snapping, bumping, and picking — perfect for UPVC and composite doors in Wandsworth and Putney.
| Standard | Application |
|---|---|
| BS3621 | Mortice deadlocks on wood doors |
| TS007 3-Star | Euro cylinders on UPVC/composite doors |
| SS312 Diamond | High-value property protection |
| BS EN 1303 | Commercial durability and key control |
| Workmanship cover | Backs every installation |
For high-value residences, SS312 Diamond Sold Secure offers top-tier attack resistance. Every lock change we make aligns with these standards, providing security and compliance with insurance requirements. And with our workmanship cover, you're always protected.
For a quote on the call, ring 020 3872 0798.
On the day of your lock change, we deliver a smooth and efficient process. First, we identify your door type—whether it's a wood mortice door or a UPVC/composite multipoint. This helps us determine the best lock solution for your needs.
For cylinder replacements, we measure each side from the center screw for a precise fit. We're prepared with a range of anti-snap cylinders, commonly 35/35, 40/35, or 40/40, and longer ones for specific doors like SW11 or SW15.
Next, we remove the old cylinder using the center screw and slide in the new one, securing it and testing the key from both sides. We adjust the keeps so that everything engages smoothly.
Finally, we hand over three new keys and a restricted-key card if applicable. Our work typically takes 15-25 minutes, and we stand behind every installation.

Fixed quote on the call — no callout fee. Snap-resistant, insurance-compliant locks fitted same day across Battersea, Clapham, Wandsworth, Vauxhall and the wider South West London corridor.
Most UK home insurers require a mortice deadlock to the current British Standard on timber doors and a 3-star-rated anti-snap euro cylinder on uPVC or composite doors. We fit both and provide documentation.
A cylinder swap is typically 20-30 minutes. A full mortice change on a timber door runs 45-60 minutes. We carry common sizes in the van for a first-time fix.
No callout fee. A fixed quote on the phone before we arrive — nothing changes when we get there.
Yes — we stock 3-star anti-snap cylinders in common sizes for uPVC and composite doors across Battersea, Clapham and Wandsworth. If your size isn't in the van we'll order same-day.
Yes — old cylinders, mortice cases and hardware are taken away with us. You keep the new keys and we provide a receipt detailing the new lock brand and standard.
Replacing a mortice deadlock on period wood doors requires precision and expertise. We know that maintaining the integrity of your period home is vital, especially in areas like Battersea and Clapham Common.
Our approach keeps the character of your Victorian terrace or Edwardian house untouched while enhancing security.
We use BS3621-rated mortice deadlocks, which meet UK insurance specifications, providing security and compliance with insurers like Aviva and AXA.
Our team meticulously removes the old lock, carefully preserving the woodwork, and expertly fits the new deadlock for maximum security.
Our experience across SW London, from the historic homes around Lavender Hill to the elegant terraces of Wandsworth Common, assures a clean fit every time.
We're safeguarding your home without compromising its character. Contact us for a reliable, professional service tailored to your needs.
When securing UPVC and composite doors, it's vital that both the multipoint and cylinder systems are up to standard.
We focus on installing TS007 3-Star Kitemark anti-snap euro cylinders, ensuring maximum protection against snapping, bumping, and picking. This is significant for modern homes in SW London, where these doors are prevalent.
Our process involves a thorough assessment of your existing lock setup.
We commonly carry leading multipoint gearbox brands like Mila Master and Yale Lockmaster, allowing us to complete most installations on our first visit.
This efficiency not only saves time but also enhances security immediately.
Reach us on 020 3872 0798 — we answer 24/7.

As homeowners in SW London, it's essential that our properties meet insurance standards to prevent potential claims issues. Making sure our locks are up to spec is critical.
Most UK insurers, like Aviva and Direct Line, require BS3621-rated mortice deadlocks on wooden front doors, especially in areas with Victorian and Edwardian terraces, such as Battersea and Clapham.
For those with modern UPVC or composite doors in places like Battersea Power Station or Wandsworth, a TS007 3-Star Kitemark anti-snap euro cylinder is necessary. This cylinder type is engineered to resist snapping, bumping, and picking, which insurers favor for added security.
High-value homes in areas like Putney or Clapham Common often need SS312 Diamond Sold Secure cylinders. These standards keep our homes not just secure but also compliant with what insurers demand, reducing risks and safeguarding our investments effectively.
At ABC Unlock Expert, we hold every lock installation to the highest standards of quality and reliability. Our satisfaction guarantee is our promise to you that we stand behind every lock we install. If you're not completely satisfied with our work, we'll make it right—no questions asked.
That cover runs from the initial assessment to the final installation. We use only top-tier products like BS3621-rated mortice deadlocks and TS007 3-Star Kitemark anti-snap cylinders to keep your home secure and insurance compliant.
Our skilled technicians are trained to handle any challenge, keeping the whole job running smoothly. We'll address any concerns swiftly, and our team is always available for follow-up support.
Your confidence is our priority, and this promise is our commitment to delivering exceptional service every time. Expect us to protect your home with the care it deserves.
For immediate help, phone 020 3872 0798.
Our engineers are DBS-checked and we hold public liability cover — certificate available on request.