I needed to get a UPVC lock opened as the gear box was broken inside. This meant the door was jammed in the closed position, and it was  difficult to identify what type of lock it was. After chatting to another edinburgh ocksmith about this, we agreed that the only way to get this open was to drill out the gears. This can take some time especially if you don’t know what lock it is. I managed to open the door, stripped the lock and fitted a temporary lock. I took the old lock to the shop to replace it, but discovered that this type of lock was discontinued. However he managed to obtain another the following day. I went back and fitted it,and the door is now opening and closing perfectly. This was one of the hardest door locks I have opened. For the majority of the time, this type of door can be opened fairly quickly,but this one really tested my abilities.