From
New London House, EC36 London Street, City of London
To
Cannon StreetCannon Street, Mansion House
Job
Master key systemsfrom £180

Master key systems · EC3 dispatch
One hierarchy for plant, risers, offices and the street door. In Cannon Street that usually means overbuild cores on lane remnants, reached from New London House on London Street, EC3R 7AD.
From
New London House, EC36 London Street, City of London
To
Cannon StreetCannon Street, Mansion House
Job
Master key systemsfrom £180
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 Cannon Street is the invoice. No hidden drill.
Station last trains; then a hard quiet on Dowgate; rooftop plant still hums.
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.

grid
From Cannon Street we also write this service against Master key systems in Monument, Master key systems in Bank, Master key systems in Cheapside, Master key systems in Blackfriars.
Other jobs we actually do on this patch: Commercial locksmith in Cannon Street, Lock change in Cannon Street, Office lockout in Cannon Street.
The full service list and area list exist so search engines and facilities teams land on a street, not a blob called London.
constraint
station forecourt is not parking is the Cannon Street version of "the van is close". We walk kits. Bollards, coaches and the ring of steel are normal.
Typical local job: Walbrook glass patch locks. Typical local housing or occupier mix: limited upper-floor residential.
Stations staff mention on the call: Cannon Street, Mansion House, Monument. They are not parking. They are how we know which court you mean.
law
Roof plant after midnight needs a named escort or a working pass. We do not wander a silent overbuild.
We record who instructed the open. Neighbouring suites in lane remnants look identical after midnight. Dowgate 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 College Hill. That is slower than a cowboy and cheaper than a complaint.
open
Cannon Street calls for master key systems tend to start on Cannon Street or College Hill, not on a generic London map pin. The working landmark is Dowgate. The working station is Monument. CITY OF LONDON LOCKSMITH1 LTD dispatches from EC3R and treats this as a Square Mile run, with station forecourt is not parking already priced into how long the last hundred metres take.
The door in front of you is likely overbuild cores. The ironmongery is likely older ovals in lanes. The failure that got you here is often construction keys still live. 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 Cannon Street 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.
stock
lane remnants dominates the Cannon Street mix. That is why suite cylinders shows up on this job more often than a suburban nightlatch. We keep cabinets on the van because roof padlatch seizures is not a rare event here.
If the job is a roof, say how you reach it: which lift, which hatch, which pass. That is the time, not the picking. If you only say "Cannon Street" we will still come; if you say Cannon Street and the intercom number we will stand in the right court.
Heritage or campus rules on this patch: Roof plant after midnight needs a named escort or a working pass. We do not wander a silent overbuild. Related openings live on locksmith work in Cannon Street and on areas covered.
hardware
Cannon Street doors in our notes: overbuild cores; glass fins; lane timber. Cylinders and cases: plant padlatches on roofs; office euros; older ovals in lanes. Access control around them: station-adjacent readers; roof-plant keys; bike-store fobs.
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.
method
First: chart the doors. Every opening, who needs it, and who must never have it. In Cannon Street that is done against overbuild cores and bike-store fobs.
Next: cut the hierarchy. Sub-masters, housekeeper keys, and a tightly held grand master. In Cannon Street that is done against overbuild cores and bike-store fobs.
Finally: stamp and issue. Cylinders stamped, keys counted, extras held or destroyed. In Cannon Street that is done against overbuild cores and bike-store fobs.
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.
portfolio
Occupiers who hold a Cannon Street door often hold another in Monument. 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.
Call the EC3 yard. We quote at the door after we see the lock.