Anti-Snap LocksSouth London TS007 3-Star Upgrades
We fit TS007 3-star and Sold Secure Diamond Euro cylinders across every uPVC, composite and timber door in South London. Ultion, Avocet ABS, Yale Platinum on the van today — from £200, sized and fitted in under 30 minutes.
The 10-Second Attack That 25% of UK Burglaries Rely On
Lock snapping is the single biggest attack method on uPVC and composite doors in the UK. Two mole grips, one sharp twist, the cylinder breaks in half — and the cam pulls out through the gap. Five to ten seconds, start to finish.
The attack works because of a design flaw in standard Euro cylinders: they stick out a few millimetres from the door handle, exposing a grip point. Burglars lever them off, crack the cylinder in two along its weakest section, then reach inside and retract the cam. No glass broken, no alarm triggered, no trace until you come home to an empty living room. Police data shows Euro-cylinder lock snapping accounts for up to 25% of residential burglaries in some UK counties.
An anti-snap cylinder — TS007 3-star kitemarked or Sold Secure Diamond — fixes this with two engineered features. A sacrificial front section that snaps cleanly along a designed fault line when attacked, leaving the secured rear of the cylinder intact. And a set of hardened anti-drill, anti-pick, anti-bump internals that stop the other common attack routes.
We are Locksmith South London, a DBS-checked local team fitting TS007 3-star anti-snap upgrades across every CR, SE, SW, SM and BR postcode. Our vans carry the three cylinders that actually deserve their reputation: Brisant Ultion, Avocet ABS, and Yale Platinum Superior — all TS007 3-star, all Sold Secure Diamond where applicable, all in the common 30/30, 35/35, 40/40, 45/50 and offset sizes. Fitting is fixed at £200 whichever brand you pick.
This page covers the full picture: how the snap attack actually works, the anatomy of an anti-snap cylinder, the difference between TS007 3-star and Sold Secure Diamond, which brand suits which door, the six warning signs you need an upgrade today, and the honest fitted price. For related reading, see our anti-snap cylinder lock product page for the individual lock type, euro cylinder lock for the base mechanism, anti-bump locks for the bumping attack prevention, or BS3621 & home insurance for the insurer angle. Full hub: security locks · advice: Locksmith Advice blog · quick contact: contact us · coverage: areas we cover.
Locksmith South London · DBS-Checked · Fully Insured · Workmanship Guaranteed
How a Burglar Snaps Your Lock in 10 Seconds
The snap attack is a mechanical failure exploit, not a skill-based attack. No lock picking tools. No training. Just a pair of mole grips or a Stilson wrench, and a cylinder that sticks out far enough to grip.
Here's the four-step sequence police forensic teams have documented on thousands of break-ins across the UK. Understanding it is the fastest way to see why a TS007 3-star cylinder is the upgrade that actually matters.
For the cylinder anatomy side of this same topic, see our anti-snap cylinder lock page. For the euro cylinder base mechanism, see euro cylinder lock.
Grip the Exposed Cylinder0:00
Burglar closes mole grips around the cylinder stub sticking out past the handle. If the cylinder protrudes 5mm or more, this is trivial. Standard developer-fit cylinders nearly always stick out.
Apply Torque, Crack the Core0:02
One sharp twist to the mole grips. The cylinder body is brass, which fractures along its thinnest cross-section — the section between the cam and the front. Audible snap, no visible damage from inside.
Pull the Broken Half Free0:05
The broken front section pulls out of the door, exposing the cam that operates the multi-point gearbox. This is the moment an anti-snap cylinder stops the attack: the rear half stays locked.
Retract the Cam, Open the Door0:10
Burglar reaches through the gap, rotates the exposed cam with a screwdriver, and the multi-point gearbox retracts. Door opens. Total time from arrival to inside the property: under 15 seconds.
Inside a TS007 3-Star Cylinder
Eight engineered features separate a real anti-snap cylinder from a regular one wearing a sticker. If the lock you're considering doesn't have all eight, it won't pass the kitemark test.
Sacrificial Snap Line
Engineered fault in the cylinder body just ahead of the cam. Snaps cleanly when attacked — the secured rear stays whole.
Hardened Front Section
Steel insert inside the brass makes the front section resistant to plier grip and initial torque. Attacker needs more force to start the snap.
Anti-Drill Pins
Hardened steel pins inside the cylinder shatter drill bits on contact. Standard cylinders drill out in 90 seconds — anti-drill pins make it a ten-minute attempt.
Anti-Pick Lever Pack
False notches in the pin tumblers defeat picking tools. The lock feels like it's about to turn — then doesn't.
Anti-Bump Design
Sprung secondary pins and offset rotation prevent the "bump key" attack where a shaped key is struck to bounce pins past the shear line.
Anti-Screw Cam
Hardened screw fixing prevents the cam being unscrewed from the cylinder body through the gearbox housing — a secondary attack route.
Reinforced Cylinder Body
Brass alloy heavier than standard, with internal steel lining. Resists deformation under sustained grip pressure.
Kitemark Engraving
TS007 kitemark with star count plus Sold Secure Diamond (where applicable) engraved on the cylinder face. This is how insurers verify.
TS007 3-Star vs Sold Secure Diamond
Two tests. Two stamps. Same outcome — an insurer who has to accept the lock. Here's what they actually measure.
TS007 3-Star
British Kitemark · BSI Tested
The British Standards Institute test for Euro cylinder attack resistance. Stars range from 1 to 3. 3-star means the cylinder resists snapping, drilling, picking and bumping for a defined test window with a defined tool list.
- Accepted by every UK home insurer
- Kitemark engraved on cylinder face
- Widely available in every common size
Sold Secure Diamond
Independent Lab · MLA Validated
Sold Secure's rating system goes Bronze, Silver, Gold, Diamond. Diamond uses a heavier attack tool list than TS007 and is validated by the Master Locksmiths Association. Slightly harder to achieve; marginally higher real-world confidence.
- Accepted by every UK home insurer
- Heavier tool attack list in testing
- MLA-validated lab certification
Our working view: Both standards are insurance-grade. If the cylinder you're buying carries TS007 3-star AND Sold Secure Diamond (Brisant Ultion and Avocet ABS do), it has cleared both tests and there's nothing more to prove. If it carries only one, you're still insurance-compliant. Don't pay a premium for both unless you genuinely want the belt-and-braces assurance.
The Three Anti-Snap Cylinders That Actually Deliver
Every brand claims anti-snap. Three deliver it in a way that survives a real attack. Here's when to pick which.
Brisant Ultion
Premium · From £200 fitted
The cylinder with “Lockdown Mode” — detects attack force and self-locks so even a correct key won't operate it until the attack stops. The top of the anti-snap market.
- Unique Lockdown Mode attack response
- 11 security features in one cylinder
- Lifetime guarantee on the mechanism
Avocet ABS
Locksmith's Favourite · From £200 fitted
ABS stands for Anti-Bump and Snap. Patented snap-secure design that breaks at a predetermined sacrificial point. Our most-fitted cylinder across South London — excellent value for the security spec.
- Patented break-line engineering
- Best value at the premium tier
- MK3 Ultimate version is the sweet spot
Yale Platinum Superior
Widely Stocked · From £200 fitted
Yale's top-end Euro cylinder. Platinum 3-star line covers the core anti-snap features plus Yale's strong distribution network means spare parts and keys are easy to source anywhere.
- Seven lines of cylinder defence
- Widest spare keys availability
- Yale brand recognition & support
Six Signs You Need an Anti-Snap Upgrade Today
Any of these on your front door and you're exposed to the 10-second snap attack. Don't wait for an incident.
Cylinder Sticks Out 5mm+
If the cylinder protrudes past the handle escutcheon by 5mm or more, it can be gripped with mole grips. Any exposed length is vulnerable.
No Kitemark on Cylinder
Look at the cylinder face. No BSI kitemark or TS007 star rating means a standard 1-star cylinder. Fails insurance criteria; vulnerable to snapping.
Door Installed Before 2015
Most uPVC and composite doors installed before 2015 shipped with a basic 1-star cylinder. Default developer fit — not an anti-snap upgrade.
Insurance Renewal Flagged It
Your insurer has started asking about cylinder specification. Some refuse to pay out on claims where the cylinder is not TS007 3-star or Sold Secure Diamond.
Break-in on Your Street
If a neighbour has been snap-attacked, the gang knows the street. Upgrade your cylinder before they come back for the same cylinder type on your door.
Spare Keys Cut Twice Over
If multiple tenants, cleaners, builders or ex-partners have had keys over the years, the cylinder should be changed regardless. Upgrade to TS007 3-star at the same time.
The Four Jobs We Do Most on Anti-Snap Cylinders
Anti-Snap Upgrade
TS007 3-star or Sold Secure Diamond cylinder fitted. Ultion, Avocet ABS, or Yale Platinum. Three keys cut.
From £200Standard Cylinder Change
Like-for-like Euro cylinder swap without the kitemark upgrade. Quick option when security isn't the priority.
From £135Emergency Lockout
Key lost, snapped, or compromised. Non-destructive entry plus anti-snap upgrade at the same visit.
From £120Free Security Audit
Cylinder inspection, kitemark check, protrusion measure, insurance compliance report in writing.
Free on SiteThree Steps. Same Day. Fixed Price.
Measure. Source. Fit. Done in 30 minutes on a standard door.
Call or WhatsApp
Tell us the door type and your postcode. Send a photo of the cylinder edge if you can — we can size it remotely and bring the exact cylinder.
Van Arrives, Cylinder Sized
30-minute average response across South London. We measure the precise cylinder length in 5mm steps before opening the lock case.
Fitted & Tested
New TS007 3-star cylinder fitted, three keys cut on site, old cylinder handed back, kitemark certificate emailed for your insurer.
Three Brands on the Van. Every Common Size. Today.
Brisant Ultion, Avocet ABS and Yale Platinum Superior — all three TS007 3-star kitemarked, all Sold Secure Diamond where applicable, all stocked in 30/30, 35/35, 40/40, 40/45, 45/45, 45/50, 50/50 and common offset sizes across our South London vans. No ordering, no waiting.
DBS Checked
Every locksmith is DBS-cleared. We work in homes, schools, care settings.
No Call-Out Fee
Quote is the price. No travel charge, no out-of-hours surcharge, no hidden VAT.
30-Min Average
Vans staged across South London CR, SE, SW, SM and BR postcodes.
Fixed Fitted Prices
You hear the price before we touch a screw. £200 is £200.
Free Cylinder Audit
Kitemark check, protrusion measure, insurance-grade written report.
12-Month Guarantee
Workmanship and parts covered. Free return visit inside the year.
Card or Cash
Pay how you like. Card reader on the van. Receipt emailed before we leave.
5.0 Google Rating
Hundreds of South London homeowners. Verified, not paid.
Kitemark Certificate
Written certificate of the TS007 3-star cylinder fitted, emailed for your insurer.
Ultion, ABS, Yale Stocked
All three premium brands on the van in every common size — no next-day waiting.
Anti-Snap Upgrade Costs — South London
Fixed fitted prices. No call-out fee. No VAT add-on. Card or cash on completion.
Standard Cylinder Change
Like-for-like Euro cylinder swap, no anti-snap upgrade. Lowest option.
- Two new keys cut on site
- Swap in ~25 minutes
- 12-month guarantee
Anti-Snap Upgrade
TS007 3-star or Sold Secure Diamond fitted. Ultion, ABS, or Yale Platinum.
- Anti-snap, anti-pick, anti-bump, anti-drill
- Three keys cut on site
- Insurance kitemark certificate
Emergency Lockout + Upgrade
Non-destructive entry, then optional anti-snap cylinder at the same visit.
- Picked open where possible
- Snapped key extraction included
- Add anti-snap upgrade for £200
Homeowners Who Upgraded in Time
Neighbour got snapped on the street three weeks ago. Called these guys, they came down within the hour, fitted a Brisant Ultion on the same day. Insurance certificate emailed before they left the driveway. Proper job.
Insurance renewal flagged our 2011 composite door didn't have TS007 3-star. Locksmith South London came, showed me the problem, fitted an Avocet ABS MK3 and handed me the certificate. Insurer accepted it within the hour.
Bought a Brisant Ultion online, tried to fit it myself, got the sizing wrong. These guys came out, re-measured, swapped it for the correct size Ultion, and didn't charge me for the wasted cylinder. Honest work.
Brisant Ultion. Avocet ABS. Yale Platinum.
Every size. Today. Fitted from £200.
Anti-Snap Lock FAQs
Real questions homeowners ask before booking an anti-snap upgrade. Short, direct answers.
What are anti-snap locks and how do they work?
How much does an anti-snap lock cost in South London?
What is lock snapping and why should I worry about it?
TS007 3-Star or Sold Secure Diamond — which is better?
Which anti-snap lock brand is best — Ultion, Avocet ABS, or Yale Platinum?
Does my uPVC or composite door already have an anti-snap lock?
Can I fit an anti-snap cylinder myself?
Other Lock Upgrades We Fit
Cylinder upgrades, security-rated locks and the problem pages that pair with this one.
Anti-Snap Upgrades Across South London
We cover every CR, SE, SW, SM and BR postcode. Browse the network or jump to a specific area.
Explore the Site
Related Security Locks
Close the Snap Risk
Today, Not Tomorrow.
Talk to a South London locksmith now. We'll size your cylinder remotely from a photo and quote you a fixed £200 before the van rolls.
24/7 emergency locksmith serving South London since 2015 — trusted by homeowners, landlords and businesses across Sutton, Mitcham, Wallington, Cheam, Purley and surrounding areas.