vauxhall astra 1999 cd di 2.0 diesel?

Hi we bought a car from a lady whos husband died in january (car was his) the car has been sat on her drive under a canopy since then without running. we towed the car home and then realised she gave us the spare key, she couldnt find the key anywhere so we got a new one programmed and have tried starting the car and it just wont start, we have now found out there is no power to the fuel pump. Does anybody know what could be causing this. the lady said it drove fine before it just struggled to start when the weather got really cold. also could it be the fuel pump fuse and where is this located please :o)