Thanks so much for the helpful offer
@onkelheri
Taffy has been riding exceptionally well for the last few months, so this trouble was totally out of the blue.
If you have seen my build thread I'm fairly intimate with my carbs / cleaning / rejetting / fettling etc.
I think something electrical has vibrated loose on my hacked in GONZO lash up. My fault as I have never made good my system following the lash up since it was installed. Serves me right! I will investigate on Sunday I hope and post my findings.