Finsbury Park Locksmith Service Team
Local locksmith team
21 Oct 2026 4 min read
If you live in Finsbury Park — whether that is a Victorian terraced house off Stroud Green Road, a flat in a converted block near Manor House, or a newer build along Seven Sisters Road — there is a good chance your front door uses a euro cylinder lock. These slim, oval-shaped cylinders are built into the majority of uPVC and composite doors across North London, and for years they were considered perfectly adequate. The problem is that a specific type of break-in technique, known as lock snapping, has exposed a serious weakness in standard euro cylinders that millions of homeowners still do not know about.
This article explains exactly why euro cylinders snap, what the TS007 star rating system actually means in practice, how to tell whether your door is currently at risk, and what an anti-snap upgrade involves. If you read nothing else, take away this: fitting the right cylinder is one of the simplest, most cost-effective security improvements you can make to your home — and it does not require a new door.
Frequently asked questions
Is anti-snap the same as anti-pick and anti-bump, or are they different things?+
They are different types of attack resistance, though many quality cylinders are engineered to address several at once. Snapping involves physically breaking the cylinder using brute force. Picking involves manipulating the internal pins with specialist tools. Bumping uses a specially cut key and impact force to momentarily displace the pins and turn the lock. A TS007 3-star cylinder is tested against all three of these methods, as well as drilling, so it offers a broad level of protection rather than defending against just one type of attack. When our engineers recommend a cylinder, they will explain which attack methods it has been tested against and what standards it holds, so you can make an informed decision.
How do I know if the locksmith fitting my anti-snap cylinder is quoting me fairly?+
The most important thing is to get a clear, confirmed price before any work begins — not an estimate that changes once the engineer arrives. Any professional locksmith should be willing to give you a fixed price on the phone after asking a few questions about your door and cylinder size. You should also ask what brand or specification of cylinder is being fitted and check that it carries a verifiable TS007 or Sold Secure rating. Be cautious of any quote given without questions being asked, or any situation where the price changes significantly once someone is at your door. At Finsbury Park Locksmith, we always confirm the exact price before we come out, and we will tell you precisely which cylinder we are fitting and what it is rated to.
My letting agent says the landlord is responsible for the locks — can I still call a locksmith myself?+
If you are locked out or facing an urgent security issue, your immediate safety comes first, and you can always call a locksmith regardless of the tenancy arrangement. For planned upgrades like fitting an anti-snap cylinder, it is worth checking your tenancy agreement, as most standard agreements require you to get the landlord's or letting agent's permission before altering locks. In practice, many landlords are receptive to anti-snap upgrades because it protects their property — and in some cases their own insurance policy may require it. If you do upgrade with permission, it is good practice to provide your landlord or managing agent with a copy of the new keys. If you are unsure of the process, our team can talk you through what to expect when you call.
What should I do if I think my lock has already been tampered with or partially snapped?+
Do not attempt to force the door or use excessive pressure on the remaining cylinder, as this could damage the internal mechanism further. Have a look at the cylinder from outside — if the outer barrel is missing, visibly sheared, or the cylinder is loose in the door, that is a clear sign of tampering. Check whether the door is still locked by trying the handle gently. If the door is secure but the cylinder is damaged, the most urgent priority is to have the cylinder replaced before the door is used again, as a compromised cylinder offers little resistance to a second attempt. If the door is not secure, do not leave the property unoccupied until the lock has been repaired. Call 020 7871 7826 and we will send an engineer straight away — we are usually with you in around 30 minutes and are available around the clock, including evenings, weekends, and bank holidays.
