'Posh Utility' label- solved?

That is absolutely correct, as much as you would think it wouldn't be. In England, rationing was actually worse after the war than during the war, especially food rationing. France tried to get its couture industry back up and running by the end of 1945 because it was an important industry for the economy of France, same with their food production for export (wine etc.) Most countries however, took it slow to avoid hyper-inflation, which had been the problem after WW1 where there was more money than goods so prices rose very quickly. It was necessary to balance goods and money for a stable economy.

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