Rowntree’s fans are being given the chance to win £10,000 if the sweets in their pack of Randoms or Pastilles are all red.

The push is being flagged up on packs with the question ‘Is this full of Red Ones?”, and will be supported by a £4m media campaign.

Consumers who don’t have a pack full of red Randoms, Fruit Pastilles or Sour Pastilles can still input a code on Facebook for a chance to win one of the runners-up prizes, which include 10 prizes of £1,000 and 10,000 packets of sweets.

Brand owner Nestlé has teamed up with augmented reality app Blippar, which will take shoppers to the Facebook page if they view a pack of Randoms or Pastilles using their smartphones.