Hi Big John,
Still getting to grips with posting on this site! Thanks for your reply. No, they don't work at all. It happened after my Dad washed the car (although this may be a coincidence). He lifted the wipers up to clean the windscreen and the next time we tried to use them they wouldn't work at all. The car has been restarted and driven several times since then but the front wipers are completely dead (rear works OK though). Looks like a trip to the garage. I'm not sure about the warranty, this is my Dad's car (55 plate but he says the warranty has expired??).
Thanks again, Lin