Catherine Tate's Nan

Catherine Tate's Nan (simply referred to as Nan on-screen) is a BBC One spin-off series of specials which follow the character of Joannie Taylor (Catherine Tate) from the original sketch comedy series The Catherine Tate Show.
When the initial series ended in 2007, a Christmas Special was broadcast in 2009, Nan's Christmas Carol which was followed by three subsequent specials in 2014 and 2015 under the title Nan.