Thanks for the advice, I will check all that and see.

When the problem first started a few weeks ago it would die and start a bit sounding rough and I would have to keep revs up to keep ot running so as you say sounds like something to do with fueling. Now it just cuts completely after a few minutes even just at idle and no amount of coaxing will get her to even kick.

I will investigate further.

Prior to this it ran like a dream, long runs, hot cold.