Backed by a £1m media spend, including TV advertising, Mars Chocolate is re-launching its 1 in 6 promotion. The campaign offers consumers a one in six chance to win and redeem a free chocolate bar. Promotional packs have been redesigned for 2014 and each chocolate bar redeemed will count as an additional sale for the retailer.

The promotion will be running across Mars, Snickers, Bounty, Milky Way, Twix, Galaxy, Minstrels and Maltesers Teaser.

Last year’s campaign attracted new consumers to the category as a whole, driving footfall in stores and boosting sales across the participating brands, claims the firm.