Dave Jennings wrote:

Rightie-ho, we have a uPVC front door with a standard 5 point mortice
lock. Lately the handle was difficult to move, mainly on the inside of
the door, but lately this has been *very* temperamental to move to
allow us to open the door.

Is this when you are locking the door, or just opening/closing it?

Also, what happens if you work the mechanism with the door hanging open
(ie, when the bits aren't engaging with the door frame)? Are tye
symptoms the same, or do they go away?

David