If your home has a uPVC, composite or patio door fitted with a standard euro cylinder lock, it’s worth asking an important question: are your locks still secure in 2026?
Understanding how lock snapping works, how to identify vulnerable locks and what standards to look for can help you make informed decisions about protecting your property and your family.
Lock snapping is a method used to bypass euro cylinder locks commonly found on uPVC and composite doors.
The technique involves applying force to the exposed part of the cylinder using simple hand tools. Once the cylinder snaps, the burglar can manipulate the internal mechanism and unlock the door.
In many cases, the process takes less than a minute and creates very little noise.
Because euro cylinders are fitted to millions of homes across the UK, lock snapping remains one of the most common methods of forced entry.
Traditional euro cylinders were designed primarily for convenience and affordability rather than resistance to modern attack methods.
Many older cylinders have a structural weakness at the fixing screw point in the centre of the lock.
If too much of the cylinder protrudes beyond the door handle, it becomes even easier to attack.
A vulnerable cylinder can often be identified by:
Even homes with strong doors and high-quality multi-point locking systems may still be vulnerable if the cylinder itself is outdated.
Lock snapping typically affects doors fitted with euro cylinders, including:
Many properties built or renovated before 2015 may still have standard cylinders installed.
This includes homes throughout South London, Streatham, Norbury and surrounding boroughs.
If you suspect your door locks are outdated, consider arranging a professional home security assessment to identify any vulnerabilities.
The easiest way to check is to look at the face of your key cylinder.
Look for security markings such as:
If your lock has no markings at all, it may be worth arranging a professional assessment.
You should also check how far the cylinder extends beyond the handle.
Ideally, it should protrude no more than a few millimetres.
If you’re unsure, a local locksmith can quickly identify whether your existing lock meets current security standards.
When choosing replacement locks, understanding security standards can make all the difference.
TS007 3 Star
TS007 is a British standard developed specifically to improve resistance against lock snapping and other common attack methods.
A 3 Star cylinder offers built-in protection and can be used on its own.
Alternatively, a 1 Star cylinder can be paired with a 2 Star security handle to achieve equivalent protection.
SS312 Diamond
The SS312 Diamond standard is awarded to locks that have passed rigorous independent testing against a range of attack methods.
Diamond-approved cylinders are designed to resist:
Many premium locks meet both TS007 3 Star and SS312 Diamond standards.
For further information about lock testing standards, visit the British Standards Institution website or explore the police-backed Secured by Design initiative.
Modern anti-snap cylinders use several innovative security features.
These may include:
Even if an intruder attempts to snap the lock, the internal mechanism remains protected.
This significantly increases the time, effort and noise required to gain entry.
In most cases, burglars will move on to an easier target.
Insurance requirements vary between providers. Many policies specify that external doors must be fitted with locks meeting recognised British Standards.
Failure to comply with policy requirements could affect future claims. Even where anti-snap locks are not explicitly required, upgrading to certified cylinders demonstrates that you’ve taken reasonable steps to secure your property.
Always check your policy wording or speak directly with your insurer if you’re unsure.
Upgrading to anti-snap locks is often more affordable than homeowners expect.
The cost depends on factors such as:
Compared to the cost of dealing with a burglary, replacing vulnerable cylinders represents excellent value for money. Most upgrades can be completed quickly with minimal disruption.
Are anti-snap locks worth it? For many homeowners, the answer is simple: absolutely.
An anti-snap lock upgrade offers several benefits:
Considering the relatively low cost of upgrading, anti-snap locks are one of the most effective home security improvements available.
While anti-snap cylinders are essential, they work best as part of a broader security strategy.
Consider combining your upgraded locks with:
Layered security creates multiple obstacles for potential intruders.
You may also wish to explore smart lock installation options or arrange garage security upgrades to improve protection across your entire property.
At SMR Locksmiths Ltd, we help homeowners across South West London and the surrounding areas identify vulnerable locks and upgrade to modern, insurance-compliant security solutions.
As a mobile locksmith service, we can assess your existing doors and recommend suitable anti-snap cylinders based on your property’s requirements and your budget.
We supply and fit high-quality anti-snap locks that meet recognised British security standards, helping homeowners in Stretahm, brixton, Norbury, Balham, Tooting and nearby villages improve their home security.
If you’re unsure whether your locks are vulnerable, we’re happy to provide honest, professional advice.
A simple lock upgrade today could help prevent a costly and distressing burglary tomorrow.
Contact Us to arrange an anti-snap lock assessment and discover whether your home’s security is up to date.
What is the difference between a standard lock and an anti-snap lock?
Anti-snap locks include reinforced components and sacrificial sections designed to prevent burglars from bypassing the cylinder after snapping attempts.
How long does it take to install anti-snap locks?
Most lock upgrades can be completed within a single visit, often in less than an hour.
Can anti-snap locks be fitted to existing doors?
Yes. In most cases, anti-snap cylinders can replace existing euro cylinders without requiring a new door.
What does TS007 3 Star mean?
TS007 3 Star is a British security standard indicating that a lock has passed testing against common attack methods, including lock snapping.
How often should door locks be replaced?
Quality locks can last many years, but it’s worth having them inspected if they’re over ten years old or showing signs of wear.
