Can anybody tell me the dates and times when Hogfather will be shown on Sky this December?

Also I understand that 12 trailers (the 12 days of Hogwatch?) have been produced to show prior to the first showing. Any one know days and times for the showing of these?

We’ve not had a reason to watch Sky since Buffy and Angel finished and my dedication to Discworld is not enough to change the habit in the hope of catching the trailers, but would like to see them in case they don’t appear on the DVD