Finally got the gas installer to come today, the problem was with a blocked
injector, nothing that my new compressor from netto for £50 (plus tools £15)
could not sort out as he could not clear it with his injector prongie
thingies.
so we now have heat plus a few quid off the bill for helping him.
thanks everybody for your help and i now know how to sort it if it ever
happens again.

--
Yours
Jason