Went down south to sunny bournemouth to do some wrestling with a mate
the night before, i went to adjust the idle and got a shock from the ht lead.
hmmmm
when i fitted new leads, i reused the rubber sleeving from the old leads.
it turned out water was sat under this sleeving, and was making its way long the sleeving where it ended near the idle adjuster.
I removed the ht lead, shortened it (to also remove possible dodgy end) removed sleeving, reftted
and got no shock.
and bike started.
I will keep you informed as to if this is the answer! whoopie
the journey there was fun, unitll my radiator started leaking.
god bless radweld!
thanks for the advice people
