Hi to all,
"Cone head" cans were introduced, as my friend Norton states, in the mid to late 1930s.
The tops of these were the standard bottle top, as on Coke bottles.
To my knowledge and after asking several veterans, beer was never supplied with rations.
The can in the photograph would probably have been sourced locally, the reason being that Lager or Pilsner Lager was not a common drink in England in the 30s or 40s. It was actually hard to find Lager in a British pub in the late 1960s / 1970s.
Porter, or better known as stout, bitter or mild were the most common beers drunk.
As one of the Lager cans shows, "Export".
In the 1950s film, "Ice Cold In Alex" all the survivors finish the film in a bar drinking Carlsberg lager, relatively unheard of here in England at the time.
Just one for all the ex military vehicle owners on here, as the German officer is driven away, there is a 1948 Series I, 80" SWB Landrover parked in the background in the square.

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Regards, Norman.
1979 Landrover Lightweight Airportable, 16HG61. "Sarge".
1986 Sankey Widetrack Trailer. 16KE20. "Private".
SUPPORTING "COMBAT STRESS", THE VETERANS MENTAL HEALTH CHARITY.