Celia Imrie unwraps a selection of the very best Christmas movies ever made and looks at why films are such an important part of the festive ritual.

As Kenneth Branagh prepares to unveil the latest version of Death on the Nile, Celia Imrie looks at how Agatha Christie's murder mysteries have been treated by film-makers over the years.

Celia Imrie takes a look at some of the leading ladies who've proved time and again, year after year, that they are amongst the very best of British talent.