https://londonist.com/london/things-to-do/50-things-every-londoner-should-do-at-least-once
Barbican conservatory
https://www.barbican.org.uk/whats-on/2021/event/visit-the-conservatory-akari-cloud
roof view on St Paul's catherdral
https://onenewchange.com/roof-terrace-one-new-change