Going around shows etc, with my vehicles and GPO memouribilla my wife has great delight in putting on display the rolls of GPO Bog paper always receives a great interest to the public. While on the subject of toilets don't forget whilst in the Loo doing ones business an ID Officer could watch your every move through the ID spy hole!. A story from the past My Dad was a mopper at Croydon 1910-until 1914. GPO push bikes were fitted with carbide lamps. Carbide is a powder when mixed with water in the lamp produced an explosive gas which when lit produced a very bright light.Boys out on delivery would forget to refill the water resevoir , hence no lamp, no lamp a criminal offence. Of course boys have a bodily reservoir and hose water problem solved,result. One time my Dad and his mates threw a 7 poundin weight open tin of Carbide down an adjoining loo when their AI was next door. Being a smoker he threw his dog end down his loo, the following explosion blew the pan to bits and the cubicle door off. Result P18's all round 4 hours pay stopped.