Hi , I need the Mondeo radio code for serial No: M073911 please?

Mondeo 05 Zetec Estate - Hi , I need the radio code for serial No: M073911 please. Just had the head gasket replaced , picked the car up only to find I now need the radio code to reactivate the radio. Can anyone help please as I don't think my wife and son can take listening to me sing a medley of 80's hits much longer!!