No.1 album act and former Britain's Got Talent contestants Richard and Adam Johnson have entered the race for the 2013 Christmas No.1 single as William Hill's odds have tipped them at 8/1.

The rankings put them in place as a Top 3 favourite act to achieve the feat, behind whoever wins this year's X Factor and 11-year-old choirboy Jack Topping who have been given evens odds and 6/1 respectively.

The Welsh brothers are set to release new single I Saw ...