British Standard Locks
Many UK home insurance policies require British Standard locks on final exit doors. LockSub locksmiths can check your doors and fit BS3621 mortice deadlocks, nightlatches and kitemarked cylinders.
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When you need British Standard locks
- Your insurance policy names BS3621 locks
- You're unsure whether your locks would be accepted after a claim
- You're a landlord meeting insurer or agent requirements
- You've moved into a property with unknown locks
How we solve it
Your locksmith will check the marks on each lock, explain which meet the standard, and replace any that don't with the right type for your door.
How your locksmith helps
- Step 1
Check each door
Locks are checked for BS3621 and kitemark markings.
- Step 2
Explain
You're told what complies and what doesn't.
- Step 3
Upgrade
Non-compliant locks are replaced if you want.
Why choose LockSub
- BS3621 mortice deadlocks
- BS3621 nightlatches
- TS007 kitemarked cylinders
- Clear invoice for your records
- Every locksmith ID-checked and insured
- Rated 4.8/5 on Trustpilot
British Standard Locks: common questions
Where do I find the BS3621 mark?
It's stamped on the lock's faceplate on the edge of the door, usually with a kitemark.
Related services
- Mortice Locks — BS3621 mortice deadlocks and sashlocks fitted, repaired and replaced.
- Yale & Nightlatch Locks — Rim nightlatches repaired, replaced and upgraded to British Standard.
- Anti-Snap Locks — Protect uPVC and composite doors from lock snapping.
British Standard Locks near you
Available in every UK town and postcode area.
Need a locksmith now?
Speak to us 24/7. We'll send the nearest LockSub approved locksmith.