[halfdaft]

It is! - except it's to hide the fly tower from the outside. The fly tower wasn't part of the original design. The first resident theatre company to be - the Royal Shakespeare company insisted upon one so the architects but came up with the genius idea of hiding it with a conservatory. I discovered this when working in the theatre space. I went exploring the fly tower (as you do) and opened a door at the top. I assumed I'd see some dark service corridor, but instead emerged into the warm, humid, nighttime air of a huge conservatory - it was easily the most magical architectural experience I've ever had.

[satori99]

I wasn't sure what you were discussing. Like, what is a fly tower? So I went down a barbican rabbit hole and found this part of a video, where one of the theatre fly techs describes the same thing as you!

https://youtu.be/uDdTUBk-qjo?t=140

[ralfd]

Can’t watch the video. What is a fly tower?