what model is it? most likely wiring released if it's a 1.2/1.4 iirc. If you don't like her, smile as its going to take a while to source i'd imagine. AA/RAC might be able to help locate an issue, but they might just see it as immobiliser and say go to a dealer. One thing i've learnt with mine is that even though the light is on, it's not always anything to do with the immobiliser.