https://www.repairmywindowsand....doors.co.uk/hackney-
Replacement Lock For UPVC Door Locks You may want to replace the uPVC locks on your doors for convenience or necessity. For example, if you have lost your keys or have experienced an incident of burglary. Employing a locksmith for carrying out this work may cost you a little, but it can be worth the security and peace of mind that a professional install brings. Lock Cylinder The lock cylinder is the part of the locking system that allows you to open and close your door. It comes with a keyhole and a slot