Mustard gas found at Woodhall Spa, two in hospital

[ColinB]

I tend to agree that they are probably 6 pound ground bombs as described herehttps://en.wikipedia.org/wiki/Bomb,_ground,_6_lb
This configuration would have contained about 2 pints of Pyro mustard gas
but there were many configurations including training pieces which could have been filled with 60% sump oil and 40% treated water or 100% used sump oil or 80% sump oil and 20% kerosene.
A full description can be found on pages 486/487 of Geoff Plunkett's definitive book Chemical Warfare in Australia.