Britain manufactures mustard

Meanwhile, the plants making both phosgene and mustard gas went into overdrive. In response to Churchill s constant demands, the output of gas increased markedly. Once manufactured, the gas was stored in underground mines in North Wales. The statistics available show a steady increase and indeed by the middle of 1944 Britain had stockpiled more than five million gas-carrying shells and bombs. In the event, of course, the phosgene and mustard gas were never needed. The RAF stopped the Luftwaffe in the Battle of Britain and in October 1940 Hitler called off Operation Sealion (the invasion of Britain) and turned his attention to Soviet Russia. 

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