Straight answers on locks.
Sourced, dated guides to what people ask us most. No scare stories, no brand bashing — including about the cylinders we don’t fit.
How much does a lock change cost in London?
Typical London prices for a euro cylinder lock change, callout and emergency fees, with dated sources.
Anti-snap euro cylinders compared: the 3-star, Diamond-rated options
Side-by-side comparison of TS007 3-star / Sold Secure Diamond euro cylinders sold in the UK.
TS007 3-star explained: what the stars on your lock mean
Plain-English guide to the TS007 star ratings for euro cylinders and handles, including the 2024 revision.
Lock snapping explained, and how to stop it
How lock snapping works, what the data shows, and which cylinders resist it.
Do landlords have to change the locks between tenants?
England: no specific legal duty to change locks between tenants, but strong duty-of-care and insurance reasons to.
Can a tenant change the locks in England?
England: depends on the tenancy agreement; keep the old lock and give the landlord a key.
Insurance-approved locks: what your home insurer means
BS 3621 vs TS007 3-star: which locks home insurers ask for on timber vs uPVC/composite doors.
How to choose a locksmith in London (and avoid being overcharged)
Checklist for choosing a trustworthy locksmith in an unlicensed trade.
How to measure a euro cylinder lock (and why size matters)
Step-by-step euro cylinder measuring, how sizes are written, and the 3mm protrusion rule.
Services
Landlord lock changes in London. £149 per door.
Tenancy-change lock replacement for landlords and letting agents, £149 per door.
Just moved in? Get keys only you hold.
Lock change for tenants and new owners after moving in, £149 flat.
Upgrade to a 3-star anti-snap lock. £149 fitted.
Homeowner upgrade to a TS007 3-star anti-snap cylinder, £149 fitted.
24/7 emergency locksmith — quoted before we set off.
24/7 emergency callouts (lockouts, break-ins, snapped cylinders), quoted per job.
Book a fitting in two minutes.
£149 flat — cylinder, fitting and three keys. Email us your postcode and door type; we come back within two hours with the slot. No callout fees, no upsells, no negotiation.