Okay - break through - have good fuel pressure so that is not the issue.
Whilst cranking it over today in the hope that she would start (but she didn't) I disconnected the iscv and she fired and ticked over momentarily!! Plugged it back in and nothing. Unplugged her again and she fired again. I could keep her running by feathering the throttle but it was difficult. So the ISCV that I have is the orange type and is mounted on the air box. It is brand new old stock that I bought a while ago so I know it is good and clean. So question is - is that my problem as I understand that they were very unreliable the ones on the airbox. Anyone got any ideas.