From
New London House, EC36 London Street, City of London
To
St Paul'sSt Paul's, Mansion House
Job
Master key systemsfrom £180

Master key systems · EC3 dispatch
One hierarchy for plant, risers, offices and the street door. In St Paul's that usually means office glass on cathedral-adjacent heritage, reached from New London House on London Street, EC3R 7AD.
From
New London House, EC36 London Street, City of London
To
St Paul'sSt Paul's, Mansion House
Job
Master key systemsfrom £180
From St Paul's we also write this service against Master key systems in Cheapside, Master key systems in Fleet Street, Master key systems in Blackfriars, Master key systems in Barbican.
Other jobs we actually do on this patch: Commercial locksmith in St Paul's, Lock change in St Paul's, Office lockout in St Paul's.
The full service list and area list exist so search engines and facilities teams land on a street, not a blob called London.
Occupiers who hold a St Paul's door often hold another in Cheapside. We can chart those on a master key visit rather than as three panics.
The EC district pages (EC3, EC2, EC4, EC1) exist for postcode searches. Neighbourhood pages exist for people who know the street.
Privacy and cookies are on privacy and cookies. Maps on the contact page load only after you opt in. We do not invent star ratings.

open
St Paul's calls for master key systems tend to start on New Change or St Paul's Churchyard, not on a generic London map pin. The working landmark is Paternoster Square. The working station is City Thameslink. CITY OF LONDON LOCKSMITH1 LTD dispatches from EC3R and treats this as a Square Mile run, with ceremony and event closures already priced into how long the last hundred metres take.
The door in front of you is likely office glass. The ironmongery is likely period mortices. The failure that got you here is often everyone on the grand master. We confirm lawful access before a pick enters the keyway: occupier, director, nominated facilities lead, or written authority from the agent. A name on a doorbell in St Paul's is not enough.
Non-destructive entry is the default on this patch, as it is on master key systems city-wide. Drilling is a named decision on the pavement. Read price bands if you can; night and Sunday supplements are written, not invented after the door is open.
night
Tourists gone; retail closed; office cleaners still in Paternoster.
Timing band for this service: phased floor-by-floor swaps. This is first-ring from London Street, still subject to the constraint on the kerb.
WhatsApp +44 7895 673226 accepts a photo of the forend if you are safe to take one. The phone remains 020 3371 1246. Company number 11001390 sits on the invoice.
standards
We write BS EN 1303, TS007, BS 3621 when we have fitted or tested them. A "high security" unbranded barrel bought to look the part is how the next attacker gets in.
Insurance language in the Square Mile and its neighbours still leans on BS 3621 for certain final exits and TS007 for replacement euros. If your schedule says otherwise, send it.
From-price for this service starts at £180 plus the hour band. The quote you approve on New Change is the invoice. No hidden drill.
method
First: chart the doors. Every opening, who needs it, and who must never have it. In St Paul's that is done against office glass and service-yard intercoms.
Next: cut the hierarchy. Sub-masters, housekeeper keys, and a tightly held grand master. In St Paul's that is done against office glass and service-yard intercoms.
Finally: stamp and issue. Cylinders stamped, keys counted, extras held or destroyed. In St Paul's that is done against office glass and service-yard intercoms.
Standards we actually name on invoices from this patch include TS007. We do not print a kitemark we did not fit. If your insurance schedule is tighter than the barrel in the door, that becomes a lock change on the same visit if you want it quoted as a separate line.
constraint
ceremony and event closures is the St Paul's version of "the van is close". We walk kits. Bollards, coaches and the ring of steel are normal.
Typical local job: service-yard padlatches. Typical local housing or occupier mix: small residential over retail.
Stations staff mention on the call: St Paul's, Mansion House, City Thameslink. They are not parking. They are how we know which court you mean.
hardware
St Paul's doors in our notes: stone-set timber; retail shutters; office glass. Cylinders and cases: period mortices; retail multipoints; office euros. Access control around them: retail staff doors; office readers; service-yard intercoms.
For master key systems we additionally carry restricted euro profiles, suite cylinders, construction-key systems. Failure modes that match this pair: unlabelled jam-jar keys; everyone on the grand master.
If the reader is the failure rather than the cylinder, pivot to access control. If the opening is damaged, pivot to burglary repair. If you simply need the suite open, office lockout may be the tighter description.
law
Event days change vehicle access. Call with the door, not with a cathedral photograph.
We record who instructed the open. Neighbouring suites in cathedral-adjacent heritage look identical after midnight. Paternoster Square is a meeting point, not a proof of tenancy.
CITY OF LONDON LOCKSMITH1 LTD will wait for ID rather than rush a wrong door on St Paul's Churchyard. That is slower than a cowboy and cheaper than a complaint.
stock
cathedral-adjacent heritage dominates the St Paul's mix. That is why restricted euro profiles shows up on this job more often than a suburban nightlatch. We keep key tags on the van because retail shutter cylinders is not a rare event here.
One New Change loading and Paternoster service courts are different stands. Name the building as the occupier writes it. If you only say "St Paul's" we will still come; if you say New Change and the intercom number we will stand in the right court.
Heritage or campus rules on this patch: Event days change vehicle access. Call with the door, not with a cathedral photograph. Related openings live on locksmith work in St Paul's and on areas covered.
Call the EC3 yard. We quote at the door after we see the lock.