That depends , kid .
The Moles were recruited in the 30's ; THEY HAD NO INFLUENCE IN THE BEGINNING THE COLD WAR - as individuals .
If you do your research , you will discover that Stalin was HELL BENT on a conflict with the West . FFS he didnt trust Molotov , for example , MANY others too . The Katyn Massacre was a PERFECT example . He went to such lengths to deny , even in the face of undeniable evidence , that Russian Army Units were made Polsh . Overnight . Papers . False Identities ... Bizarre . The West were reactive in this . Capitalist Economies need War AND Peace . They werent looking for another conflict ..However , The NUCLEAR word now abounded .
Thus , the Stakes had increased . It thus became imperitive to see your neighbours , Hand , to use a Poker Analogy . Berlin , then manifested itself as a Battle Ground . It was incremental but inevitable , from , Id say when the 2nd Front did not appear in '43 and the Allied Invasion of Southern Italy instead of France was another factor . Stalin claiming later , we left him hanging - we did ...
The Marshall Plan was initially a Catch All Plan for regeneration but later took on Political - Anti Russky connotations . As did the Warsaw Pact / Nato .
The Sputnik Space Programme FRIGHTENED the U.S. sufficiently for them to send a Man to the Moon within a decade . It was that . You hit me ... I hit you ...
Anyway , hope it helps , kid .
In review British Intelligence had VERY LITTLE impact . Enigma was no longer a weapon . Its usefulness had decreased directly as a result . We were included more as a favour . Oppenheimer had Werner Von Braun by then . The Brits were bit part players ...
Good Luck , Welts .