Visiting the National Physical Laboratory
The National Physical Laboratory (NPL) is a large laboratory in Teddington, London where they do things with metrology, measurement, and standards. They hold an open day once a year inviting members of the public to come in and look around. The site is massive and there’s loads to see - I only got around half of it before running out of time.
Like some other tours I’ve been on, there were plenty of extremely knowledgeable staff on hand to explain the oddities we were seeing and demonstrate some of the experiments they’d set up.
They have two rooms with spiked insulation used for testing radio emissions from electronic devices. If my memory serves me, they tested phones and satellites in here. The pyramids are actually really hard and solid despite appearances.
I should probably make a note of what some of the things I photograph are showing - this looks to be some kind of microscope, but ¯\_(ツ)_/¯.