Olivia Colman’s unusual crumpets topping unveiled in new Warburtons ad

Broadchurch actor Olivia Colman has joined the likes of Sylvester Stallone, Samuel L Jackson and George Clooney in appearing in an advert for bakery brand Warburton's, revealing an unconventional choice of topping for her crumpets.

Entering Jonathan Warburton's office as a "very special agent" from the “Department of National Treasures,” Colman later takes away stacks of crumpets for testing.

Holding a crumpet topped with strawberries and cream inside a car, the actor reveals the national treasure investigation was “made up.”

"Thanks for the crumpets," she adds.

The advert debuts on ITV on Saturday (3 May).