From Wikipedia:

Adjacent to the station is the former site of RAF West Ruislip, which was until 2006 a co-located US Navy facility and elementary school, leased from the Ministry of Defence.

So yeah, here's a game about the RAF. End of the line, folks, might want to take the return train.

Thanks Kukeemon!!! Getting off now :D

Thanks

I got your key. thanks.
What a great London subway GAs!!