It has cruise control but not electric. It is most likely a short.
I had to replace the head lights a while back (what a job) and could have done some damage to the wiring to the front blinkers.
That's the most likely place as I haven't fiddled with anything at the back, but I do take the seat off to strap in luggage when I travel overseas.
I would say Biggles is right and it's an exposed wire that is shorting out when the bike is on the move.
Thanks again for the almost immediate responses and helpful hints.