Thanks to all of you for really helpful advice and the time spent giving it. I am very grateful.
The 'tea leave's are a real worry especially in Central London. Maybe a notice that there is no faceplate to steal might help?
This will be the last of my retro-fits apart from a possible re-map. Obviously, lots of advice and help will be requested from all of you, that is if you don't mind.
I will have to come to a decision re the Sat Nav in the next few days. This is what happens because I did not spec the car properly in the first place. Silly sod me!
Very hot in London today.