We were called out to this property when the customer was finding it very difficult to lock / unlock the door. We found that the key had a lot of movement and suspected that the curtain inside was badly worn. We removed the lock from the door and replaced the curtain inside the sashlock.
We re-fitted the lock to the door. Now the lock works brilliantly with all the existing keys.
This part often wears first inside these locks. This lock is an Era British Standard sashlock.
This makes for a quick, cost effective repair.