Lock Change London: Should You Replace the Whole Lock or Just the Cylinder?
One of the first questions we settle on arrival is whether you need a full lock change or simply a new cylinder. On a uPVC or composite door, the euro cylinder is the barrel your key turns, and it can be swapped out on its own without touching the rest of the multipoint mechanism. That means if you have lost a key, moved into a new home, or want to stop an old tenant or builder getting back in, we can often restore your security quickly by fitting a fresh cylinder to the correct size — a neat, tidy lock change London homeowners appreciate.
A full lock change is the right call when the mechanism itself is worn, seized or damaged, when the existing hardware is a weak snap-prone cylinder, or when a wooden door has a tired mortice lock that no longer throws smoothly. We will always explain the honest difference on the day: what each option protects against, what it costs, and why. The final quote depends on the type of lock, the door, the parts needed and the time of the call-out, and we confirm that figure with you before any work begins.
For wooden doors fitted with a mortice lock, 'changing the cylinder' does not apply in the same way, because a mortice lock does not use a separate euro barrel — the whole lock case is replaced if the locking is to change. We carry a wide range of hardware so that most residential lock change services are completed in a single visit, leaving you with keys that only you hold.






