In the 1970s, Linton on Ouse possessed a couple of very rudimentary instrument navigation trainers for the Jet Provost - not a proper simulator but it allowed one to navigate a route while flying on instruments. When not in formal use, student pilots could ring the operator of this facility and book it for a short session of check-list training etc.
Unfortunately, an edition of the Linton phone directory was published with a couple of the digits incorrectly swapped around, mistakenly giving the phone extension for a WRAF officer in SHQ. Feel sorry for APO Bloggs who innocently rang the number, failed to register that it was, unusually, a female voice at the other end and when trying to reserve the "Type Instrument Trainer" (as it was called) blurted out "Can I book one of your TITS for 30 minutes this afternoon please?".
The offending equipment was renamed the "Jet Provost Instrument Trainer" (J-PIT) shortly afterwards.