Thanks for all the help and tips guys. However, I had somebody come and buy the bike from me at the weekend, so it’s now gone. As I mentioned, it did run with a live to the ignition coil, so I think it probably is a loose/bad connection somewhere, but the new owner will be sorting it out.
Now I just have my 2014 Bonneville T100.
I am 64 now and am a bit tired of tinkering with older bikes, besides, the old joints/muscles ache after grovelling around on the floor or being bent over or crouched down for too long.
So I’ve copped-out and it’s the easy life for me. Dealer service once a year and that’s it.