She also played Billis in the 2011 Doctor Who Christmas Special, The Doctor, the Widow and the Wardrobe. The daughter of former British ambassador Sir Michael Weir, she is a famous for her roles in The Fast Show (alongside Mark Williams) and books including Does My Bum Look Big In This? (a catchphrase of one of her characters in the show) and Onwards and Upwards, first published in 1999. Arabella also writes articles for The Guardian periodically. These articles, although mainly about recent events, commonly include details regarding Arabella's life and the things that she considers to be pestiferous.