Now fixed!! Car broke down just before Xmas and AA man said it was a dodgy alternator, which I thought was strange as it was new two years ago. Anyway started to look online for new one, saw cheap brand new ones called RTX so checked them out but soon found out they are cheap for a reason, anyway found a recon one on eBay for £80 and it works perfectly, and guess what make my old one was...yes an RTX one!! So don't buy RTX alterators!