Animals, short people and TV chefs are on the menu this Boxing Day as the hosts of comedy game show We Need Answers challenge you to a seasonal quiz with a difference

Ever since he found out Father Christmas didn't exist, the comedian Mark Watson has been a pessimist. Then in February – on his 30th birthday, as he became a dad for the first time – he decided to turn over a new, optimistic leaf. But can you really overhaul life-long personality traits?