I like how 'LUTON' is printed on the window, incase they forget where it is!
In our defence . . . . .
This was three months before we went operational and it was decided to open the place up for public visits. The signs were to try and head off the 'Which way is north?' 'What town is that over there?' etc. So there
It was only after we joined NATS and started to get some NATS ATCOs along I had to put them back up . . .