Some of you may already be digging into Christmas flavoured crisps. 

Companies like Walkers bring out new flavours for a variety of reasons, and some of its Christmas choices were ‘pigs in blanket’ flavour, festive turkey and sweet and spiced Christmas pudding. 

So how do companies pick their crisp flavours?  And what tends to work and what doesn’t? 

Tom Keogh, founder and managing director of Keogh’s Crisps joined Kieran on The Hard Shoulder...