Thanks chaps: appreciate the thoughts.
I will admit to doing something & feeling a total nugget as long as you keep it to yourselves.... When I tried to turn the bandit over to check the basics, I couldn't get anything out of the starter: lights dimmed but no turny over. I looked at it for a while & decided to bridge across the solenoid - starter spun! Eventually she fired into life: not bad considering how old the fuel is.
I pulled the solenoid/relay out of the bike & set about figuring out what might be wrong with it. A quick squint through the wisdom of the interweb revealed that there could be an issue with the loom at the headstock, a dodgy kill switch or starter button, or.....
It could be that you have to pull the clutch in.....!

I'd forgotten all about having to do that on Suzukis. Luckily, the good lady wasn't about when I found that so I can claim it was the underclunken rod had fouled the zimmerman flange and it was a total biatch to fix....
