UK Gov't chartered BOAC Britannias to take Caribbean immigrants to Britain in the '50's. The 312 had a small cubicle at the front rigged as a Gents Toilet, i.e. urinal only. Steward came on to the Flt. Deck one night and whispered in the Flt. Eng's ear, who promptly laughed and started writing in his Tech. Log, then showed me ...." Urinal used as Arsenal, please clean." The maintenance engineers at the next stop cleaned as requested, then wrote " Rectumfied"