“Shit. I didn’t know it was this kind of place,” says Momtaz, the manager of the punk band at the centre of the Channel 4 sitcom We Are Lady Parts. This is the classic dodgy British pub gig: the all-white male clientele, Vote Leave posters, Union Jacks. It is daylight, and surprisingly full. The band – four women with three of them wearing head coverings – take the stage.