It was supposed to be a lovely day at my parents’ yesterday, me and J and the kids, enjoying my mother’s cooking (side-eye to camera), sitting in the garden, hanging out with my dad. Unfortunately, I’ve either developed Crohn’s Disease from nowhere in a matter of hours, or I’ve caught a stomach bug (My mother: “How can you have caught a bug?” Me: [stares meaningfully at our three sticky children who socialise daily with other sticky children]) which meant not only did I sleep our entire visit, but when I was awake on arrival and at departure, I did a fair impression of someone who was mocking Cancer Dad and his terminal bowel cancer (shuffled step, hunched over, swollen stomach). Real cool.

But it does mean that today, while the children are off picking up new bugs to bring home to us like dogs with a dead bird, I’ve been forced to do nothing but catch up with stuff on the telly recorder box. Hurray! Sadly it’s not on iPlayer anymore, but I’m sure you wizards could find some functioning link to The Battle of the Sexes, from the BBC’s Storyville strand (always excellent), about Billie Jean King and her match with professional troll and proud “male chauvinist pig” Bobby Riggs.

Although the match is the framing device, naturally it’s about so much more than that. From how tiny the women’s prizes were compared to the men’s, to how few their competitions were - plenty of events were men’s tennis only - to how Billie Jean King along with eight others signed up for a dollar each to start their own pro tennis tour (boo, Virginia Wade) - right through to the match with Riggs, and beyond: to the excellent, incredible Venus Williams finally getting equal pay for women at Wimbledon.

But just to remind ourselves why a weary, ‘Sometimes, it’s not about feminism’ is bullshit: the film finishes with the reminder that tennis is still the only sport in which women and men are paid the same. Jesus.