GREENOCK actor Martin Compston has teamed up with a Line of Duty co-star to ‘crack the case’ in a major supermarket’s Christmas advert.

Waitrose has launched a festive campaign focused around a Red Velvet Bauble Dessert which disappears from a family’s fridge.

The store has called in the help of Martin and fellow actor Vicky McClure, known for their portrayals of DI Steve Arnott and DI Kate Fleming in the popular ITV drama, to solve the case.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

A post shared by Waitrose (@waitrose)

 

The pair, who appear as themselves, are seen watching television together when the empty box inside the fridge catches their attention.

Martin and Vicky begin discussing who the culprit could be - with even the family cat drawing suspicion.

Waitrose is inviting viewers to share their theories before it releases part two of the advert.

Line of Duty fans on social media shared their delight at seeing the duo reunited.