British Standard Locks (BS3621): What They Mean for Your Insurance
Your home insurance may quietly require 'British Standard' locks. Here's what that means and how to check yours qualify.
What is a British Standard lock?
BS3621 is the British Standard for thief-resistant locks. A lock that meets it has been independently tested to resist drilling, picking and forcing for a set time. On a mortice lock you'll see the BS Kitemark (a heart-shaped symbol) stamped on the faceplate.
Many home insurance policies specify that final exit doors must have a BS3621 lock — and a claim can be affected if they don't.
How to check your locks
Look at the metal faceplate on the edge of the door for the Kitemark and 'BS3621'. Timber doors typically need a five-lever mortice deadlock to the standard. UPVC and composite doors use multipoint locks, where the relevant cylinder and mechanism standards apply instead.
If you can't see a Kitemark, your lock may not meet the requirement — worth checking against your policy wording.
Upgrading for security and cover
Fitting BS3621-rated locks not only helps satisfy your insurer but genuinely improves security. A locksmith can confirm whether your current locks qualify and upgrade them where needed, including anti-snap cylinders for UPVC and composite doors.
We can check and upgrade your locks across Catford and South East London — just ask when you call.
Popular locksmith services
Every visit is handled with a security-first approach. We check the door, frame, keep, cylinder, handle, closer or mechanism before recommending a repair, so customers understand whether the fault is a simple adjustment, a lock replacement, a UPVC gearbox failure, a commercial door alignment issue or urgent make-safe work after damage.
For local SEO and customer clarity, this page connects the main Catford locksmith service with nearby South East London areas and the exact services customers search for. The business covers urgent and booked work for homes, rented flats, landlords, shops, offices, salons, restaurants and other local premises that need a reliable locksmith or commercial door specialist.
- Emergency locksmith response in Catford and SE6
- Domestic lock repairs, lost keys and lock replacements
- UPVC door locks, multipoint mechanisms and anti-snap cylinders
- Commercial locksmith work, shop doors and door closer repairs
- Burglary repairs, boarding up and same-day make-safe support
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Call 07557 957349 or send an enquiry for locksmith help from Bromley Rd, London SE6 2TS. You can also view the local base on Google Maps.