Guys after a lot of scratching of heads and 2 hours from a mobile auto electrician who scratched his head along with me!! then I gave in. had a good nights sleep then omg I can do this kicked in, with this I went and bought the most valuable piece of kit a Fullfat owner can have "Automotive current sensor" maxi fuse type (parasitic drain tester) sat in car waited for it to go to sleep (20 mins later) started trying all the fuses, there were a few with o.01 and 0.02 draw on them until I got to fuse 59 for the auxiliary heater and that went up to 9.98 amps while she was supposed to be off and asleep!!! I think I have cracked it!!!!!!!! you all need to get a tester at £13 its a invaluable piece of kit.

I will post if the issue hasn't gone away
Yours one very happy fullfat owner If i could would you!!!!