Looking threw the responses I do not find anything convincing.
The one true gold standard argument will not work as you will never accomplish the one true anything in this world.
Talking about the Fed is not a good argument here because at the time the UK was the world power at the time.
Perhaps the Mises people should write a book, or recommend one, about the depression in the UK similar to Rothbard's book on the US.
Possible arguments about the UK I could come up with:
1) The British exported their problems to their colonies particularly India. Perhaps a book about the depression in India? In effect rearmement forced colonials to buy weapons from the UK, and pay for British to administer them. The UK and the colonies should be looked at together.
2) The British were supported by the US. The UK exported it's problems to the US.