Well the rust hole is now "repaired", just needs another coat of paint.
The horn is still not working but I know why now. The horn push on the Momo wheel is broken. I can't fix it though as the heads of the screws holding the wheel assembly have been rounded off. Gonna pop into Maplins tomorrow on the way home from work and pick up some wire, a fuse holder and a push button. Ghetto fix FTW!
I think the MOT runs out on 2nd or 3rd of August so it'll do the track day on the 25th of this month and then put it in and see what happens! Bad holiday timing though as I'm down in the west country from the 3rd till the 9th so I can see me just paying to get anything it fails on fixed as I'm not about to do it myself and I will need the car for getting to and from work as the Rado MOT expires while we're off as well.
Nick