Fun fact about Post Office Tower (aka BT Tower, Telecom Tower, and GPO Tower):
Its location was designated an official state secret as it was of considerable importance to the UK telecommunications network
This was despite the fact that it was a just under 200m tall building in the middle of London and was, at times, open to the public, with a restaurant at the top
Yeah, it wasn't until 1996 that anyone could legally tell you where it was
"Where should we aim the missile Vlad?"
"I dunno Ivan, maybe this massive tower covered in antennas that doesn't officially exist but has a souvenir shop and a rotating restaurant"
"Yeah, probably that one Vlad"