“Swimming pools do have a Pavlovian effect on people’s bladders,” Celia Imrie chuckles to a not quite six-year-old Tamsin Greig, as the two actors float about an imaginary pool in the intimate space ...

How do you take two national treasures and make them really quite awful and annoying? Well, like this. Celia Imrie is Beth, the strong-willed, callous, possessive mother of Tamsin Greig’s meeker ...