After the total system failure that occurred on the trip up to Suffolk that I mistook for simply the van body shielding, and then the performance that could have ruined the trip to Amsterdam, the Quest went back to Garmin in Hampshire and came back yesterday.
Or rather a different one came back yesterday, and that is the problem. It fired up great but cos it is a different unit, it wouldn't let me load any maps. Mapsource works though, I simply can't add maps to the unit and open them.
Garmin have been very quick and today I have a new unlock code to type in and see if that works... Watch this space.