Why did the British support the Whites in the Russian Civil War till the very end?

by orthoxerox

Why didn't they switch sides or become neutral when it became clear the Bolsheviks were winning? Are their intentions (e.g., form a government in exile and wait for an opportunity) documented anyhere?

CockMyBratwurst

There was still a hope that the White movement could win and reestablish the Tsarist autocratic government. The new Soviet government was not seeking any alliance with the West because the Western nations were regarded as the imperialists of the world and enemies of the spread of working class revolution in society, and the fact that the West gave large amounts of military and financial aid to the Whites during the civil war.

While the United Kingdom and other Western powers could have tried this tactic, it would've probably not been proven fruitful.