An official photo describing the kit of a British infantryman in 1939. Note that the gas mask ('respirator') and anti-chemical warfare cape are parts of the outfit, remnants of WW1 memories. In actual combat, and marching with full kit, the British infantryman would carry a pack known as a "valise" that contained more clothing and personal items. Officers wore the exact same uniform save for markings of their rank.
I stare wide eyed. I knew he had to be someone low ranked. I can tell from his walk. But the fact that he had no mask on is what frightened me. His face was obviously used to the sun. "Stop him!" I hear people shout before the unmasked man runs off, giving me a wink.