I started off with a vague idea for an episode on staircases, based on what my toddler likes around the house, and ended up with this.

A staircase is never just a staircase, because small steps, done properly, really can shift the mood of an entire neighbourhood.

Here's an article about the missing Catford Green bridge - https://ladywell-live.org/2021/01/17/austen-steps-up-campaign-for-catfords-missing-bridge/

and another - https://www.salamandernews.org/is-catford-station-links-project-moving-at-last/

This is the book I mention by Jos Boys - https://disordinaryarchitecture.co.uk/start-learning/doing-disability-differently-book