"Andy Hall" wrote in message
...
There is a bolt which goes through the door edge side of the lock into
the cylinder.

You need to undo this, and then turn the lock with the key and you
will find an internal cam will line up and the cylinder will slide
out.

My "Multi Locks" have a brass plate which covers the head of the bolt that Andy
refers to. The brass plate is held by screws at top and bottom.

Michael Chare