Did British forces help Finland in the Winter War against the USSR in 1940? If so, did they cross Nazi-occupied Europe to get to Finland? If they did that, did the German Abwehr facilitate their passage? If the Abwehr did help, how was this help requested and negotiated? Were there secret communications channels between the Abwehr and the British at that time? Some people think that there may have been such channels later in the war. At that time Germany and the USSR were allies (or at least, partners in a non-aggression pact), and Britain was at war with Germany (although not with the USSR, I think).

I am motivated to ask these questions by a sentence in Richard Bassett’s book about Admiral Wilhelm Canaris (then head of the Abwehr), “Hitler’s Spy Chief: The Wilhelm Canaris Mystery” (paperback edition, 2006). Bassett says:

in Finland where the British forces sent to help the Finns against the Soviets in 1940 were actually assisted in their passage by the Germans. German air & land forces were instructed not to interfere with the progress of these British forces.”

For this claim, Bassett cites Frederick Winterbotham, “The Nazi Connection”, p. 164 (London 1978). But Winterbotham’s book seems to have nothing about the Winter War. Finland is not even listed in the index.

Basset also cites Winterbotham for a claim that Luftwaffe General Milch visited the RAF in Britain before the war. However, none of the pages of Winterbotham’s book which mention Milch say this.

Perhaps relatedly, Kermit Roosevelt (son of Teddy) was in Britain at the start of WW II and organized a group of volunteers to go and help Finland. But, according to his Wikipedia page the war ended before this expedition could get underway.