My Vectra (diesel 02plate).was running normally, l parked it up, next morning it failed to start. l had a friend attempt to start it, and l checked the exhaust, there were no sign of any spent diesel being emitted, there is plenty fuel in the tank..
Whats the probable cause or causes.. Thank you...

startter motor

if u explained a lil more woulld be easier to answer

need some more info is the engine turning over? are any warning lights on your dash flashing any work done or other faults recently

Its probably a leak off pipe return split a known fault with Vectra