Has anyone got a new one, preferably some one with a company car, who would not mind a borrow of for a fee, to upgrade. That is prsuming no special code is required, does anyone know if this is possible

There are two sets of DVD discs for different revisions of the sat nav unit so you need to make sure you get the right one otherwise it won't work.

If you just want to test the newer disc why not ask your dealer?