All done and dusted thanks to the advice on here, thank you very much.
I taped off the yellow/black wire so that it only starts from the button now and not with the key.
Whilst I was under the drivers footwell I also took the opportunity to replace the pollen filter as my aircon was blowing a bit weak...
I even got round to doing the old golf-tee mod on the exhaust, sounds great
A bit of cursing and spitting but got it done in the end, not bad for a one armed bandit with a broken wrist.