Extract from the diary of Norman Hughes, “B” Coy, 1/4th Cheshire Regiment 53rd (Welsh) Division [Norman Hughes came from Neston]
We march in rear of our lines to an open clear spot where we have a practice gas attack. Smoke bombs are thrown and real gas is turned on us as we march along towards the gas cylinder. The smoke bombs were thrown first that being a signal for us to don our gas helmets, which we did very quickly then the real gas was turned on. There were no casualties.