@Risyandi94 @VeryThorough @Netlify @lsostlukes I believe you are right. The instruments were in the room we used, which was a practice room at At Luke's - used by the London Symphony Orchestra.
We'll spotted!
https://lso.co.uk/lso-st-lukes.html
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.