Cadbury Trebor Bassett (CTB) is launching a 29p price-mark promotion in the run-up to Christmas.

The price cut starts on November 5 and runs for a limited time.

It applies to single bars of Crunchie, Double Decker and Boost.

Retailers will also receive four free bars in every outer and packs will feature a prominent price flash in a bid to catch shoppers’ attention.

Kate Harding, acting head of customer relations at CTB, says: "Crunchie, Double Decker and Boost are three of our most popular single bar chocolate brands, worth a total of £43m.

"The pricemarked pack promotion will enable retailers to drive sales, while offering their customers even better value for money on their favourite chocolate bars."

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