Given how few full Doctor Who novels there are set at Christmas, we today speak to the writer of a very wintry book.

Joining us from across the pond is Lloyd Rose, discussing her Seventh Doctor PDA The Algebra of Ice, which features Ace and the Brigadier.

Please excuse the quality of the interview, as the conversation with Lloyd took place using a traditional phone line, which we've tried to clean up as best as we can.

Please, we feature a pair of readings from the novel, as usual.