cheers matty. hi mark - just driving home from work last week (a four mile journey) I didn't notice it starting to overheat, but when i pulled up outside the house it was steaming and temp gauge up to max. on investigation it had a crack in the plastic section at the top of the radiator. got it recovered to a mate's garage (a picador) hoping it was just going to be a replacement rad job. he's done a head gasket test (the colour test) he said it changed colour pretty quickly in just a few seconds so he's got onto the local dealership for me and they've quoted him nearly £2000 (actually closer to £1500 cos he knows one of the guys there) for the head gasket job, cam belt (recommended) and a new rad/ coolant etc. they reckon about 10 hours work!!
still feeling totally gutted.