Walkers has confirmed it is to add a limited edition Baked Bean flavour to both its crisps and Monster Munch ranges to help raise funds for Comic Relief.

It plans to back the newcomers with a burst of TV ads starring brand ambassador Gary Lineker.

Packs are available from the beginning of next month for eight weeks, with 1p from each single pack and 5p from multipacks going to the charity. The bagged snack giant also plans to donate a further £1m.

Five million multipacks will also feature an in-pack giveaway of a whoopee cushion named either Wet & Windy, Atom Bum or Sonic Boom.