I’ve been reading the cracking, crackling new biography Biddy Baxter: The Woman Who Made Blue Peter by Richard Marson (he’s a friend, but I wouldn’t sell you a pup). There is always fun to be had in the gap between the transmitted, necessarily anodyne, product of children’s TV and the real-life shenanigans backstage, and the story of the often forbidding Biddy serves this up in satisfyingly salty dollops.