An Anglo French imperial block needs a pod prior to ww2.
You must remember that while USA was 'allied' to Britain and France in ww1 & ww2 there actions were very successful at breaking the western allies empires and long term strengths. If the avoid these actions you also avoid USA coming out of isolationism.
If the Anglo French blocks bounces Germany in ww2 and scares Japan off before a war they can maintain a block that is the main counter weight to the Soviet union. America though will probably maintain their isolationism and sponsor separatist and guerrillas in the other powers when and where they please.
WI about an earlier POD - the Soviets being greatly more successful in the Russian Civil War? The Soviets push deep into Eastern Europe and annex more places into the USSR (e.g. Poland, Romania, Hungary). The British and French panic, quickly allow Germany to revise the Versailles restrictions to re-arm and form an 'Ostwall' bulwark against the 'red contagion' spreading further west. (France may be more amenable to this if there is a domestic communist uprising that has to be crushed by the French Army). The British and French also pump support to Italy, Greece, Spanish generals, Yugoslavia, Czechia to clamp down on communism. Eventually, this all converges into a conservative, rabidly anti-communist Western European alliance bloc with a heavily militarised eastern border against the revolutionary Soviet Union. The USA doesn't want to get entangled in any of this and so withdraws back into isolationism, but is still loosely aligned with the Western European bloc due to anti-communism.