MARK Billingham spent 27 years in the SAS, fought in Iraq and won the Queen’s Commendation for Bravery after capturing an IRA sniper by using himself as bait.

But his toughest gig was not on the battlefield — it was guarding estranged Hollywood couple Brad Pitt and Angelina Jolie, The Sun reports.

Billingham, known by his nickname Billy, was their eyes and ears for 18 months and became so close to their children he reckons he was their unofficial father.

Now he is entering the world of showbiz as a new instructor for UK Channel 4’s SAS: Who Dares Wins. The show puts 25 civilians through an SAS selection test in the Ecuadorean jungle.

It’s not for the faint-hearted, and one thing is for certain: Brad Pitt should not apply.

Billingham, 51, says: “Brad wouldn’t last long because he wouldn’t have any cream to put on his face.

“It would be too sweaty and uncomfortable for him. He’s too pretty! But Angie could do it. She’d probably be the only one with balls at the end. She would stick it out.”

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