The Tommy is carrying a Boys antitank rifle.
My father-in-law was a signaller in the Territorials in 1939 attached to a battalion of 25lbers and went to France with the BEF. They were based near Lille. When the Germans invaded France and the lowlands they were moved up near Brussels. In the ensuing retreat him and his mate were ordered to 'get in this slit trench and cover this field, there might be German tanks coming through any moment!' Armed with one Lee Enfield and a Boys. Ray had only fired about five rounds of ammunition during his training, his mate had more experience so he had the Boys which apparently had a massive kick on it. Luckily they didn't see the tanks!
He was fortunate at Dunkirk as it was peeing with rain when they got there near the end of the evacuation - they got straight on a ship and had no interference from the Luftwaffe. He kept his mates spirits up by reading the obituaries from the papers

He later served in Basra.
Ray died peacefully in his sleep last October, I miss hearing his stories.