Nice article. I like the Barbican and have spent a fair bit of time there over the last 25 years. I even worked out how to get from A to B without getting lost. Not been recently though.
The appearance of various Barbican adjacent locations in Slow Horses was a nice touch. And very on-point given the nature of Slough House.
Do they still have the rubber foot pedals to make the water come out of the taps in the public loos? Of course, being the Barbican the loos smell appalling and the taps frequently don't work, but it's all part of the charm.