If you're going to make a big deal in the national press about how top secret your high security greenhouse is, I'd recommend hiding it a bit better so two nerds in a slack channel can't find it within 15 minutes of idle searching.

https://www.bbc.co.uk/news/science-environment-68497720

Sycamore Gap: New life springs from rescued tree

BBC News is shown the secret site protecting the remains of the Sycamore Gap tree felled last year.

BBC News
National Trust, I am happy to offer opsec advice in return for a tour of the high security greenhouse

Reminds me of how National Grid insists their transmission system control centre is a "secret location", but everyone knows it's just outside Wokingham.

I trust National Grid's physical security a bit more than National Trust's, though. No offence.

@russss to be fair most of their buildings are literally Listed
@flangey @russss listed as cultural heritage?

@nicoduck @russss yeah. "listed building" in England comes in grade I, II*, or II and is protected from being altered or demolished. About 2% of buildings are listed

A "List-X Site" is a commercial property in UK approved by the government to process information which is classified Secret or above