Walkers is offering customers a one in six chance of winning a free lunch, up to the value of £4.

The on-pack promo runs until July 11 and includes a ‘1 in 6 wins a free lunch’ flash and a 12 digit code. Customers can enter the code on the Walkers website or by text to find out if they have won.

The £4 lunch can be redeemed against Walkers crisps plus any food item. Retailers can add soft drinks too if they wish.

The campaign is supported by TV, digital and in-store activity.

Matt Goddard, field sales director at PepsiCo, said stackers and chiller baskets will be available to support the promo.

“We urge retailers who are not yet involved in the campaign to sign up to avoid missing out on this huge opportunity,” he added.

Retailers can get involved in the campaign by signing up here.