So you lost the key and now you are unable to remove the lock.
How to change a upvc door lock barrel without a key.
Remove the retaining screw.
Drill the barrel out using an appropriately sized metal drill bit.
Should cost 15 20 for a new barrel from a decent diy store.
This screw is what holds the lock in place.
You may be better off with a skeleton key to attempt to open it as locksmiths are very expensive.
Located in the faceplate on the side of the door the retaining screw is usually even with the bottom of the lock cylinder and keyhole.
How to replace a euro cylinder lock when the door is in the closed locked position.
There may be a small pinhole holding the handle in place.
The metal is soft and is not difficult to drill you will then be able to open the door to access the screws to remove the barrel.
Insert the pin straight through the lock cylinder to reach the lock s release mechanism.
Examine the handle and trim on the interior side of the door.
Use a screwdriver to twist the retaining screw to the left loosen it and remove it from the faceplate.
Locksmith tanning video on how to remove a screen door lock cylinder hen you don t have a key how to replace a security screen door lock cylinder barrel w.
Insert a straightened paper clip into this hole and apply pressure to release the interior handle.
The barrel may have to be drilled out and obviously the new one fitted and also you may now have to dismantle the whole lock to get the remainder of the barrel out once drilled and without damaging the rest of the mechanism.