Changing a lock is simple work. Choosing the right one is where it goes wrong, because the two specifications that matter to your insurer are rarely explained by whoever is fitting.
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Moving into a property is the clearest case. You have no idea how many keys exist or who holds them — previous owners, their relatives, tradespeople, letting agents. Changing the locks on the day you move in is the cheapest security measure you will ever take.
Lost or stolen keys are the second case, and the question is whether the key can be connected to the address. A key lost in a city centre with nothing identifying is a low risk. A bag containing keys and a driving licence is a different matter and the lock should be changed that day.
After a break-in, after a tenancy ends, and after a relationship ends are the others. In each the issue is not that the lock has failed but that you no longer control who has a key.
Most UK home insurance policies specify a British Standard lock on final exit doors, and the standard they mean is BS3621. On a timber door that means a five-lever mortice deadlock; on a uPVC or composite door it usually means the multipoint mechanism plus an appropriate cylinder.
A genuine BS3621 lock carries a kitemark stamped on the faceplate — the kite symbol and the standard number. If your lock does not have it, it does not meet the specification, regardless of how solid it feels.
This matters at claim time rather than now. An insurer assessing a break-in through a door fitted with a two-lever mortice where the policy specified BS3621 has grounds to dispute the claim. Checking takes ten seconds and the upgrade is inexpensive.
A standard euro cylinder can be snapped in seconds with basic tools, leaving little visible damage. It is the most common method of forced entry into UK homes with uPVC doors, and the reason is simply that a lot of doors still carry the cylinder the installer fitted as standard.
The industry response is the three-star cylinder, which breaks in a controlled place and leaves the lock still holding. Look at the cylinder face for a kitemark and three stars. Some combinations reach the same protection with a one-star cylinder plus two-star security handles.
If your door has neither, upgrading takes about fifteen minutes. There is no better value security change available on a uPVC door.
If you have a front door, a back door, a side gate and a garage on four different keys, they can usually be suited so one key opens all of them. It costs more than replacing a single cylinder and pays for itself the first time a key goes missing, because you replace one thing rather than working out which four locks are now compromised.
Landlords with several doors in one property, or several properties, should ask about this specifically. A suited system with a register of who holds which key turns most lock changes into a single cylinder swap.
A tenant can normally have a lock opened for a property they live in. Changing a lock is different — it usually requires the landlord's agreement, because the landlord retains a right of access and needs a working key.
There are exceptions where there is a genuine safety concern, and those are worth taking advice on rather than acting alone. Where a landlord asks for a change between tenancies, that is straightforward and routine.
In shared houses, internal room door locks are frequently part of fire door certification. Changing one without checking can invalidate it, and the cost of putting that right lands on whoever changed it.
Three steps, and you know the price before anyone touches the door.
What has happened, what kind of door, and where you are. You get a likely cost range and an honest arrival estimate — not a best case.
The locksmith looks at the actual lock and confirms the price. If it is more than the estimate, you hear why before work starts, and you can say no.
Door opened or lock fitted, everything tested with you there. Card or cash on completion, with a receipt and warranty.
Lock Changes across Bristol, Birmingham, The Black Country.
On a uPVC or composite door, usually just the cylinder — the mechanism inside the door edge is separate and normally fine. On a timber door with a mortice lock, the whole lock case is replaced.
Look for a kitemark and the number stamped on the faceplate — the edge of the lock visible when the door is open. If there is no kitemark, it is not BS3621.
A euro cylinder tested to resist snapping. It breaks in a controlled place and leaves the lock holding. Check the cylinder face for a kitemark and three stars.
Yes, in most cases. It is called a suited system and it means one cylinder to replace when a key goes missing rather than several.
Yes, on the day if you can. You have no way of knowing how many keys exist or who has them.
Usually only with the landlord's agreement, since they retain a right of access. Ask them first.
Not if the lock allows otherwise. Most standard cylinders and nightlatches can be opened non-destructively. Some high-security locks cannot, and if that is the case you will be told before anything is drilled, along with the cost of the replacement.
It depends on the lock type, the time of day and whether the cylinder survives. You get an estimate range on the phone and a fixed quote at the door. There is no charge if you decide not to go ahead once you have the quote.
It depends on where you are and what is already booked in. You will get a realistic time on the call, and a message if it changes.
Yes, the line is answered 24 hours. Out-of-hours rates are explained on the call, not added afterwards.
Yes, for entry to a property you live in, with proof of residence. Changing locks in a rented property usually needs the landlord's agreement, and we will tell you where that line sits.
Ask for the company name, the locksmith's name and the vehicle before they arrive. You will get a written receipt with the business address on it. If anything about a locksmith feels wrong, do not let them start work.
Yes, card or cash on completion. Payment is taken after the work is finished, not upfront.
No. We do not work on vehicles at all — no car keys, no transponder programming, no key fobs. That needs a specialist auto locksmith with different equipment, and we would rather tell you now than waste your time.
