The main impact of the lack of imports was a disruption of Lager supplies. Prior to WW II, Guinness excepted, almost all the beer imported into the UK was continental Lager. Wartime circumstances would have made it impossible to import, whatever the UK government might have wanted. The main pre-war sources - Denmark, Belgium, Czechoslovakia and Germany were all under Nazi control by the summer of 1940.
"VEG. PRICE CONTROL LIKELY TO DO HARM, STRACHEY DECIDESThe sources of imported Lager remained much the same when the trade resumed. Though It wasn't until the early 1950s that imports from Germany resumed.
ALL kinds of green vegetables may be imported from abroad under an open general licence from now until June 15, the Food Minister, Mr. Strachey, told the Commons yesterday.
He said that he had reluctantly decided that price control of green vegetables without rationing might do more harm than good while supplies are short.
So many would disappear under the counter that working-class households would be little better off.
Supplies of potatoes, he said. were now improving rapidly and should be nearly normal bv the end of this week. Unless prices of root vegetables dropped quickly to a reasonable level, he would either arrange for imports or impose price control. Other replies by Mr. Strachey.
COCKTAILS.— Sale of low strength cocktails and inferior liquor will be banned after this month.
LAGER BEER.- Some imports" of lager beer from continental countries are to be allowed.
Daily Mirror - Tuesday 25 March 1947, page 3."
Great news that low-strength cocktails had been banned. That must have lifted everyone's spirits.