Peter mcgrath, the cylindrical object you refer to looks like an air supply duct to the ACMs. Definitely not an oxygen cylinder which are coloured green (aviation grade breathing oxygen).
BOAC you have misunderstood my post #417. I did not claim the explosion occured near the crew oxy bottles. I merely pointed out the intent of the Boeing AD which refered to the crew oxygen stowage brackets. The hole in the fuselage was well aft of the crew oxygen location.