All, thanks for the feedback, based on the above I decided to wait for garage to take a look.
Turns out root cause was water ingress into boot - boot solenoid failed, and emergency release cable is apparently linked to this, so they had to break into boot effectively.
Canbus control unit also flooded so that's why rear lights not working.
I think a cover will be purchased if leaving outside again for a while.
I hate to ask, but how much was the canbus control unit.....
On the Plus 8 it sits on top of the fuel tank, so not likely to be flooded...unless something has gone very wrong indeed!
