Lock
Change and Repair

Staff left. Keys walked. A contractor barrel is still in a £20m fit-out. A tenant handed a set to a courier. Those are lock-change jobs, not lectures. We measure the cylinder, match the security grade to the door and the insurance wording, and leave you with a counted set.

TS007 3-star euro cylinders are the usual upgrade on timber and aluminium City doors that currently hold a builder barrel. BS 3621 mortice deadlocks remain the insurance language on many final exits. Multipoint gearboxes on shopfronts fail in the handle, not the cylinder; replacing only the barrel does not fix a dead strip.

After a lockout, stay for the change if you want yesterday's keys useless. See emergency locksmith for the open, then this page for the ironmongery. After forced entry, burglary repair may be the parent job.

Euro cylinders are measured from the centre screw each way. A 35/45 that should have been 45/50 is how you get a cylinder that sticks out and invites a snap attack. We measure on the door, not from a guess on the phone. Thumbturns on inner office doors are a different conversation to double-key cylinders on a street entrance that insurers want keyed both sides.

Anti-snap, anti-pick, anti-bump, and a sacrificial front section are not marketing adjectives; they are the TS007 test. We fit kitemarked product and write the stamp on the invoice. Cheap unbranded "high security" steel from a market stall is how the next attacker gets in.

Areas such as Barbican still hold original estate ironmongery that should be repaired, not ripped out. Leadenhall glass towers want slimline hardware that does not wreck a patch fitting. Both are lock changes. They are not the same bag.

A mortice that sticks may need a new follower, not a new case. A nightlatch that will not hold may need a keep packed, not a shiny replacement that does not match the British Standard already on the policy. We repair when the lock is honest and replace when it is tired or compromised.

Window locks, cabinet locks, and secondary doors are the same visit if you mention them. Call 020 3371 1246. CITY OF LONDON LOCKSMITH1 LTD, 11001390, New London House, 6 London Street. Prices are from-figures.

A floor of identical cylinders should be planned as keyed alike or as a master key hierarchy, not as eight separate emergencies. We will survey, stamp, and cut. Neighbouring streets are listed from each area page so facilities teams with split portfolios can still land on the right URL: Monument, Tower Hill, Cannon Street.

The contact form is for planned runs. The phone is for today.

Measure. Cylinder length, cam, offset, and the door thickness before we pull the old lock.

Match the grade. Insurance and door type decide BS 3621, TS007, or a commercial oval.

Fit and hand keys. Operation tested, old keys destroyed on request, receipt left.

Hardware on the van for this job: TS007 3-star cylinders; BS 3621 cases; multipoint gearboxes; nightlatches; window locks.

Parts commonly fitted: cylinders; mortice cases; gearboxes; keeps; screws and shields.

Named standards: BS 3621, TS007, PAS 24, BS EN 1303. Timing bands: same-day City changes; planned multi-door runs; after a lockout.

Failure modes we actually see: worn plug; snapped cam; gearbox teeth gone; keep torn from frame.

Street-level URLs exist so you do not land on a generic London page: Lock change in Bank, Lock change in Moorgate, Lock change in Liverpool Street, Lock change in Aldgate, Lock change in Barbican, Lock change in Fleet Street, Lock change in St Paul's, Lock change in Monument. The remaining City areas, boroughs and EC districts are linked from areas covered and from each neighbourhood page.

Related services: Emergency Locksmith, Commercial Locksmith, Burglary Repair and Boarding, Master Key Systems.

Call 020 3371 1246. CITY OF LONDON LOCKSMITH1 LTD, company 11001390, New London House, 6 London Street, EC3R 7AD. From prices start at £85.

The method on this page is the same method we use on Bank, Moorgate, Liverpool Street, Aldgate, Barbican, Fleet Street, St Paul's, Monument, Cheapside, Blackfriars, Cannon Street, Tower Hill, Smithfield and Leadenhall. Neighbouring boroughs get the same bag and an honest clock. We do not swap in a suburban paragraph and change the place name. Hardware, failure modes, standards and timing bands above are the reason the sentences differ from a lock-change page or a safe-opening page.

If you are standing at the door now, the useful next step is the phone, not another scroll. If you are planning a floor of cylinders, send a door count and a photograph of one forend. If you lost a grand master, treat it as an incident and recode the layer it opened. If the opening is splintered, board it tonight and restore the lock to spec tomorrow if the frame can take it.

How long does a cylinder change take?

A straightforward euro on a timber door is a short visit once we are on the floor. Measuring, matching, and testing still matter more than speed.

Will my insurer accept TS007 or BS 3621?

Those are the usual City specifications. We fit kitemarked product and record it. Your policy wording still governs; send it if you are unsure.

Can you match my existing key?

Only if the system is designed for it and you have a lawful right to copies. Restricted keyways need the owner's card.

Do you change uPVC and aluminium multipoints?

Yes. Gearboxes, keeps and cylinders. We do not pretend a new barrel fixes a broken strip.

Can old keys be destroyed on site?

Yes, on request, once the new cylinder is in and tested.

Do I need this after a staff member leaves?

If they held a key to a street door or a plant room, yes. Fob deletion is not enough when a mechanical key still exists.

This Lock Change and Repair page exists so a search does not collapse into a generic London blob. TS007 3-star cylinders Attendance is still from New London House, 6 London Street, EC3R 7AD, with lawful access checked before a pick enters the keyway.

Non-destructive entry stays the default here. BS 3621 cases Drilling is a named line you can refuse. Night and Sunday bands live on the prices page. Company number 11001390 sits on the invoice.

Call 020 3371 1246 if the door is in front of you. multipoint gearboxes WhatsApp +44 7895 673226 accepts a forend photograph when the street is quiet enough. Maps and analytics wait for cookie consent. We do not invent star ratings.

Internal links from this URL reach services, neighbourhoods, prices, contact and about. nightlatches Neighbouring streets get their own pair pages rather than a copied paragraph with the place name swapped.

CITY OF LONDON LOCKSMITH1 LTD is the legal entity. window locks The Square Mile empties at weekends; that changes walking distance from a legal bay, not the ID rule. Plant rooms often hold a cheaper cylinder than the street door, and we will say if it should be raised to the same grade.

This Lock Change and Repair page exists so a search does not collapse into a generic London blob. worn plug Attendance is still from New London House, 6 London Street, EC3R 7AD, with lawful access checked before a pick enters the keyway.