Thanks for all the replies folks, now sorted.
Turned out it needed a good cleaning as the air wasent getting through properly, now working perfectly again
Hi all
Got a glow-worm mk2 boiler, been fine and dandy until yesterday and it turned itself off. Re-lit pilot light and all was ok again, felt a bit cold so i checked radiators and they were cold. After a bit of experementation i have found about 2-5 minutes after i turn central heating on...