Thanks for all your replies l have now solved what happened,please read on. My car is in a garage owing to a argument with a crash barrier on friday it was decided to start work and put it in to the repair bay, off went the bloke with the key unlocked the car with the switch key and then for some reason left it so the immobiliser came on he then tried to start it and thought a flat battery,so off he went for the power pack put it on and blew the main fuse, the 120amp one.
This l found out today (Sat) and have a new one on its way.
As a matter of interest how do you get the bloody thing out l just ended up breaking it,instead of getting it out in one piece:(