On Mon, 19 Oct 2009 14:50:49 +0100, "Dave Baker" wrote:


My key
has only 3 prongs on it though and I've just had a measure and it's exactly
45mm from the edge of the door to the centre of the keyhole. So it's looking
like a standard 67mm lock then? Every dimension will be the same in a new
lock?

Union 3-lever lock dimensions on this page. (Note that 3 lever locks are fairly
easy to pick)
http://www.lockshop-warehouse.co.uk/acatalog/Lockshop_Warehouse_UNION_Three_Lever_Mortice_Locks _11.html
or shorter:- http://tinyurl.com/yz6clka

--
Geo