Alas, it's not really the Perfesser's not-so-secret hideout.
Worth mentioning is the fact that, despite it having become one of London's great landmarks, and being very obviously visible, it was actually secret. Oh yes, that's why I chose it as my lair, because it's secret.
It was designed to withstand hurricanes, war, and civil collapse. The lower floors were packed with hardware to ensure that even if London's power went out, battery banks and generators would keep communications working, even if the country's cabling was destroyed, the microwave antennae would communicate with distant towers. It was part of a secure signals network called 'Backbone'. It is, as were many other microwave relay stations around Britain, cylindrical, because cylindrical buildings best withstood nuclear blasts in Hiroshima/Nagasaki.
So it was a secret place, under the meaning of the official secrets act. It was illegal to take photographs of it, despite the fact that for a while it was the most photographed building in London.
In fact, until the 1990's it did not appear on Britain's official Ordnance Survey maps.
Its secret status was referred to by MP Kate Hoey in the House of Commons, in 1993:
"Members have given examples of seemingly trivial information that remains officially secret. An example that has not been mentioned, but which is so trivial that it is worth mentioning, is the absence of the British Telecom tower from Ordnance Survey maps. I hope that I am covered by parliamentary privilege when I reveal that the British Telecom tower does exist and that its address is
60 Cleveland Street, London" (Hansard col.632).
Below is a mock-up of the Perfessor's evil mad scientist laboratory. (It's really a laboratory in the University of London.)
The perfessor's lair might well be lit with illuminated lab-flasks, as seen here in the very pleasant cafe area of the Wellcome Collection in Euston Road, London.
Where else would you be able to see a bacon-thin slice of a whole human?