Comedian Dom Joly has shown his support for Save the Children's Christmas Jumper Day, appearing in two videos on the charity's YouTube page.

Joly, a longtime ambassador for the charity, plays two characters, Bjorn, who prefers understated jumpers, and Brian, who takes a shine to more 'wacky' designs, encouraging Twitter users to choose their favourite style by tweeting either #Nordic or #Wacky. Head of digital Mark Weber said the aim of the lighthearted Battle of the Jumpers is 'to make sure the whole nation gets into jumpers' to raise money and awareness for the charity on Christmas Jumper Day, December 13.