Author Julia Donaldson has told how she had to rewrite one of her best selling books in order to get the green light for it to be turned into a BBC animation for Christmas Day. This year millions will settle down to watch The Scarecrows' Wedding, the latest adaptation of Julia Donaldson and illustrator Axel Scheffler’s stories which have become a festival staple. The half-hour animated special features an all-star voice cast, with Gavin and Stacey star Rob Brydo n voicing Reginald Rake, Hamnet