Vauxhall Corsa Fan Belt Problems

i was driving to work last night and my battery light came on,i checked the fan belt was working and it was!it started fine to get me home thn after a few hours i went to my car and it was completly dead any help please??

Hi ive had my 51 plate corsa for a year and a half and has been running fine its had the timing chain and new fan belt fitted january this year at 81000 miles its at 86000 now and was running fine up until a couple of days ago just after th...