SAS: Who Dares Wins' Mark Billingham reveals vital piece of advice he gave Brad Pitt
SAS: Who Dares Wins' Mark Billingham was once a personal bodyguard to A-listers Brad Pitt, Tom Cruise and Kate Moss
SAS: Who Dares Wins' Mark Billingham was once a personal bodyguard to A-listers Brad Pitt, Tom Cruise and Kate Moss