Service
Lock Upgrades & Anti-Snap Locks
Most UK home insurance policies now specify a minimum lock standard, and many homeowners only discover this when a claim is questioned. The two specifications that come up again and again are British Standard BS3621 for external timber doors and TS007 3-star for UPVC and composite cylinders.
- Availability
- 24 hours
- Base
- Skelmersdale
- Coverage
- 30-mile radius
- Guarantee
- 12 months
In short
KMG Locksmiths upgrades door locks to British Standard BS3621 deadlocks and TS007 3-star anti-snap cylinders across Skelmersdale and West Lancashire. These are the specifications UK insurers require, and Martin provides written details of what was fitted so you can evidence it.
If your door does not currently meet the standard your policy requires, upgrading is straightforward and inexpensive compared to the cost of a refused claim. Martin fits to specification and gives you the details in writing.
Why anti-snap matters
The most common method used to break into a UPVC or composite door in the UK is snapping the cylinder. The exposed portion of a standard cylinder is gripped and snapped off, exposing the internal mechanism, which can then be turned with a tool in seconds. It is quick, quiet and requires no skill.
A TS007 3-star anti-snap cylinder is designed so that the cylinder breaks in a controlled way that leaves the mechanism protected. Fitted to the same door, it defeats the technique entirely. It is the single most cost-effective security improvement available on a modern door.
British Standard deadlocks
BS3621 is the British Standard for thief-resistant locks, and it is what most insurers specify for the main external door on a property. The lock must resist drilling, picking, force and a set of standard attack techniques.
On older timber doors, a BS3621 deadlock is a meaningful upgrade rather than a formality. Many older properties still have night latches that offer very little resistance to a determined attempt.
What your insurer actually asks for
Policies vary. Some specify the lock standard only; others also require window locks on all ground floor openings, or a particular standard on patio doors. The requirement is normally set out in the policy schedule or the security section of the terms.
If you are unsure, bring the wording when Martin arrives and he will tell you what meets it. He will then provide written confirmation of the specification fitted, which is the evidence an insurer asks for if a claim arises.
After a break-in
If a property has been broken into, upgrading is not optional. The point of entry needs securing properly, and the weak point that allowed it needs addressing rather than simply being replaced with the same thing.
Martin treats these as urgent call-outs, secures the property first, and then discusses the upgrade. Replacement locks carry a 12-month guarantee.
Typical prices
What this usually costs
Honest figures for real jobs in this area. You are quoted an exact price before Martin sets off, there is no call-out fee and no hourly meter.
| Work | Typical range | Notes |
|---|---|---|
| TS007 3-star anti-snap cylinder | £90 – £160 | Fitted, with written specification |
| BS3621 British Standard deadlock | £95 – £150 | Timber door upgrade |
| Window locks, per window | £90 – £160 | Insurance requirement on ground floor |
| Full property security review | Free with any work | Honest advice, no sales pressure |
Figures are typical for this area and cover labour and standard parts. You are quoted an exact price before Martin sets off. Prices reviewed October 2026.
Frequently asked questions
An anti-snap lock is a cylinder designed to resist the most common method used to break into UPVC doors - snapping the cylinder to expose the mechanism. If your door has a standard cylinder fitted, upgrading to a TS007 3-star unit is inexpensive and closes the most exploited weakness in modern doors.
It is normally stated in your policy schedule or in the security section of the policy terms. Most UK policies require a British Standard BS3621 deadlock on external timber doors and a TS007 3-star cylinder on UPVC or composite doors. Bring the wording when Martin arrives and he will confirm what meets it.
A TS007 3-star anti-snap cylinder supplied and fitted is typically £90 to £160 depending on the door and the cylinder length. That is a modest cost against the protection it provides, and it is usually done in a single visit of around twenty minutes.
Yes, as standard. Insurers ask for evidence of the specification installed when a claim is made, so Martin provides written details of the lock type, standard and date fitted. Keep it with your policy documents.
Lock upgrades by town
Local pages for this service in the towns KMG covers most often.
Areas covered for this service
KMG Locksmiths covers Skelmersdale and the surrounding towns, extending to a 30-mile radius.
Emergency line open now
Need lock upgrades today?
Martin answers his own phone, gives you a price before he sets off, and works 24 hours a day, 364 days a year. No call-out fee, no hourly meter.