Set in Leeds, the series explores the lives of several slimming club members, with a focus on the various ways their weight has impacted upon them.
Four of the cast – Ruth Jones, James Corden, Sheridan Smith and Alison Steadman – went on to appear in the sitcom Gavin & Stacey.
Jonathan Ryland, who played Kevin, the husband to Ruth Jones' character, also appeared in Gavin & Stacey as the celebrant who presided when Pete and Dawn renewed their wedding vows.
The club is run by the formidable Carol (Janet Dibley), who fruitlessly tries to persuade the members of the group to follow the "Super Slimmers" diet.
Region 1 A stage musical adaptation of the series directed and written by original creator, Kay Mellor, with music by Nicholas Lloyd Webber made its world premiere at the Grand Theatre in Leeds on 7 November 2017 before embarking on a UK tour, starring Jodie Prenger as Kelly Stevenson.