Fokker 1000, I regret to say that in my time in the Service, (mid '50's to '80), this did occur more or less as stated! Not always welcome by us junior ranks!! Also, Shy Torque, when at Shawbury, mid-60's (CFI on UBAS), we had a Royal visit and the male toilets in the Officer's Mess were converted to female and I remember the senior WRAF officer having to use them before the visit, whilst the organising party listened outside!!
Those were the days (maybe)!!