The Christmas season brings with it one of Britain’s great (and unique) art forms: the pantomime. With dames and best boys, princesses, prince charmings and dastardly villains to hiss, a good panto is a must to raise the festive cheer. Following our pick of shows to book for kids, here’s our recommendations for the London pantos – three Jack and the Beanstalks, three Cinderellas, two Aladdins and the, er, Odyssey – to enjoy…