Could be lots of different things, its a diagnostic light and doesn't neccesarily relate to the glow plugs. On mine the injectors needed reprogramming, I think this is fairly common. Hope you get to the bottom of it soon!
thanks, i hope she starts! Ive spent about 800.00 on her in the last 2 months including the smash and MOT, ive changed jobs since buying her a few months ago and am doing up to 1k miles a week now, she has 140k on her now, wondering if im better trying to change sooner rather than later, only used to do 8/9k a year! so the 130k didnt worry me at the time.