I managed to follow the instructions, having replace the turn switch gear (without fixing the problem), I managed to remove the flasher relay...quite tight space. Opened it, did the heat the connections with a soldering iron (I have to say I thoguh when doing it - I couldn't see any cracks - this can't be right - but I persited) put the relay back in (with abit of a struggle) and the flashers worked again.
I have 4 way working, both turn indicators not worked (well they occationally worked - becoming very occationally worked).
Anyway, it seams to all be working OK now, and if it fails again then at least I know to replace the Flasher Relay now.
thanks for the guidance.