the fans have gone into overdrive though (and i had the aircon turned off and the blower air wasnt being directed at the windscreen)
anyway the car didnt seem to be overheating so i continued and the light was flickering on and of (then the friendly red stop light started coming on as well)
get home and fans are still going manic but it still wasnt giving any sign of overheating
so after my tale of woe and worry
any advice gratefully received....
cheers
peter