Audi V8 wont start any ideas??

[AshleyRS2]

My LHD Audi V8 has decided it doesnt want to start up any more!! No spark just spins over like a good en!! The car is now booked in to Audis but im worried its gonna cost a bomb to sort any ides wot to look b4 i send it to the main agent?? Ive disconnected the alarm, tried new plugs and Battery. There is no pulse to crank sensors or injectors!! Any help would be good thatks for looking!