This 'game' used to take place with both Nimrod and Shack crews also, but I can't remember the full layout either I'm afraid. It was definately fire extinguishers we used (famous story of a crew getting thrown out of the 'Cally Pally' in Gib doing it and letting them all off!)
Pontius the Navigator - you must be able to help out here, you spent long enough on the dear old ladys' - can you help this chap out??
TSM