Walkers and Heinz are teaming up to produce Heinz Tomato Ketchup flavoured crisps. Walkers already had a Tomato Ketchup flavour but the Heinz version ­ which has taken six months to perfect ­ has proved more popular during trials. Both brands' logos will appear on pack. The new crisp flavour will be available later this year backed by a marketing campaign. Sir Steve Redgrave, who Walkers has just signed up to promote its products, is likely to front the Ketchup crisp campaign. {{MARKETING - P&P }}