Related Clues:

• Places to go on the base
• Simple toilets
• Places people go to go on base
• WCs for GIs
• Entrails of military loos
• Army heads
• Heads of the fleet?
• 27 is left around toilets
• Where soldiers go?
• Rental is negotiated for barracks toilets
• Heads learn it's unusual
• Privies for privates