Hi Mark, have put a trace on the keys with Royal Mail and should get an answer.
Both units will only have gone if you had the battery switch on the dash engaged. The socket in the kitchen goes via the Benimar box (The one in the dinnette under the seat which will now have a red light next to it displaying which fuse has blown) and the battery switch is from the same fusebox I described in the earlier posting. If you get stuck call me as I am home all weekend.
What were you using an inverter for, the National Grid

Use the 2 supplies near the leisure batteries under the seats for inverter power, the socket at the back was fitted only for low power units like torch chargers/phone chargers etc.
Also got some good tips on inverters if ya need some advise.