Fond memories of all 3! Hattie was big in more sense than one & was briliant as the Matron in some of the Carry On & Doctor at Large films. I did a passable impression of the nasal toned, rather condescending Kenneth Williams, whose character was often pursued by the matron in the films. Here, he seems to be trying to humour the grim faced John Le Mesurier. Apparently, Williams was never happy when he wasn't the centre of attention but he really could have you in stitches!