From
New London House, EC36 London Street, City of London
To
LeadenhallBank, Monument
Job
Master key systemsfrom £180

Master key systems · EC3 dispatch
One hierarchy for plant, risers, offices and the street door. In Leadenhall that usually means tower glass on new glass fins, reached from New London House on London Street, EC3R 7AD.
From
New London House, EC36 London Street, City of London
To
LeadenhallBank, Monument
Job
Master key systemsfrom £180
Leadenhall calls for master key systems tend to start on Whittington Avenue or Leadenhall Street, not on a generic London map pin. The working landmark is Lloyd's of London. The working station is Bank. CITY OF LONDON LOCKSMITH1 LTD dispatches from EC3R and treats this as a Square Mile run, with wind on high loading docks already priced into how long the last hundred metres take.
The door in front of you is likely tower glass. The ironmongery is likely slimline suite locks. The failure that got you here is often unlabelled jam-jar keys. 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 Leadenhall 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.
Tower security is a partner. We do not bypass a desk that already knows the occupier.
We record who instructed the open. Neighbouring suites in new glass fins look identical after midnight. Lloyd's of London 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 Leadenhall Street. That is slower than a cowboy and cheaper than a complaint.

hardware
Leadenhall doors in our notes: tower glass; market shutters; Lloyd’s-adjacent commercial. Cylinders and cases: high-security plant; market euros; slimline suite locks. Access control around them: tower turnstiles; market trader doors; roof-plant biometrics plus key.
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.
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 Whittington Avenue is the invoice. No hidden drill.
night
Towers empty; market restaurants run; Lime Street becomes a canyon.
Timing band for this service: survey then manufacture. 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.
method
First: chart the doors. Every opening, who needs it, and who must never have it. In Leadenhall that is done against tower glass and tower turnstiles.
Next: cut the hierarchy. Sub-masters, housekeeper keys, and a tightly held grand master. In Leadenhall that is done against tower glass and tower turnstiles.
Finally: stamp and issue. Cylinders stamped, keys counted, extras held or destroyed. In Leadenhall that is done against tower glass and tower turnstiles.
Standards we actually name on invoices from this patch include BS 3621. 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.
portfolio
Occupiers who hold a Leadenhall door often hold another in Bank. 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.
after
You should leave with a working key or a reset, a written figure, and a note of the stamp on slimline suite locks. Old keys can be destroyed on request.
If staff still share one key between a floor, master key systems is the planned conversation. If the closer slammed the latch, the closer is part of the job, not a mystery for next week.
The legal entity is CITY OF LONDON LOCKSMITH1 LTD, New London House, 6 London Street, London EC3R 7AD. Contact and map after cookie consent. About the company for the boring facts.
voice
Say Leadenhall, Whittington Avenue, the floor, the door type if you know it (tower glass), and who has the right to enter. Say whether security is on a desk. Say whether it is survey then manufacture.
Do not say "near Bank" as the only address. Do say the intercom label. Do send a forend photo if the street is quiet enough.
We will tell you if the job is actually Master Key Systems or a sibling service. Getting the noun right is how you get the right bag out of the van.
constraint
wind on high loading docks is the Leadenhall version of "the van is close". We walk kits. Bollards, coaches and the ring of steel are normal.
Typical local job: market shutter cylinders. Typical local housing or occupier mix: almost none; occasional caretaker flats.
Stations staff mention on the call: Bank, Monument, Aldgate, Fenchurch Street. They are not parking. They are how we know which court you mean.
Call the EC3 yard. We quote at the door after we see the lock.