RAF Summer Camp Colerne late 1960s
Self as Cadet Warrant Officer swapped contents of sugar bowl for Andrews Liver Salts. Fellow Cadet ladles into tea cup which does a passable imitation of a volcano. "You should complain about that tea " I suggested. Cadet duly approaches RAF catering NCO (no contractors in those days). Caterer's head dives into tea urn and gives a puzzled look. Meanwhile I replaced the sugar.
Happy days