Sorry Keith, I wouldn't have known who Edd Winchester is :-)
And thanks for the information, I had a go at things earlier before I saw your post. I somehow managed to stop about 0.65 amps of drain by tinkering with the boot catch sensor, which looked in good order, and the boot light wiring, which also looked ok. As I couldn't see anything wrong I am not precisely sure what I fixed, so that's a bit annoying.
Anyway, now the draw is a more reasonable 0.4 amps and there is no rough idle or stalling at all and amazingly NO MCSF light when started up. Anyone that gets the MCSF after a cold start, and I know there are a lot of you, I would seriously recommend connecting up a fully charged battery and see what happens.
I will have to keep an eye on things now to see how it goes and I will check fuse 3 when I get a chance.
Radio is still disconnected so I will have to sort that out too. But it's been a very successful day, touch wood.