Tidied up the wiring around the starter relay.
Had 3 or 4 occasions where I have pressed start and instantly everything dies, all instrument lights and obviously no start either. This only ever happens when starting and is intermittent, things come back to life again a few mins later. It has never lost power when running and I do 60 miles a day.
Checked out wiring diagram and the only place I can see any likely hood is the start relay.
So opened it up today and there is evidence of being played with, Looks like an alarm has been removed, Red was spliced with a short wire poking out and yellow/something was cut with either end spliced to two smallish lenths of wire which had then been twisted together and tapped up. Not really identifying my problem because if the yellow twisted pair had disconnected then there would still be panel lights but no start moter, if the red live had shorted then I expect the fuse would have died. Anyway I cleaned up the live connection and removed the little bit sticking out, I have spliced into the red further away with a tap

and this is ready for an alarm. I have connected the start wire with a long loop of wire and left the loop under my seat again ready for an alarm (I can cut into this later if I use remote start).
Hopefully no more problems but if it happens again will probably try a new relay.
Finally washed her down and went for a quick spin.