“Arms for Russia – a great convoy of British ships escorted by Soviet fighters sails into Murmansk harbour with vital supplies for the Red Army.” From the National Archives of the UK. 1939-46
For much of World War Two, the Soviet Union was far more popular among the British public than the United States.
There were large demonstrations for “Second Front Now!” That Second Front eventually being the Normandy Invasion. The news of the cataclysmic battles in the Soviet Union between the Red Army and the Wehrmacht led many of the British public to think of the Soviets as better allies than the Americans since the Soviets were fighting and the Americans weren’t. At least, not until June 6th, 1944. US efforts in Italy and North Africa while appreciated, didn’t come close in the minds of the British public with the defeats inflicted on the Wehrmacht by the Soviets. And that is true.
Much of the horrifying detail about life under Stalin and the Bolsheviks wasn’t known to the wider world at the time of World War Two. It took decades for people in the UK and most of the Western world to truly understand how murderous the Stalin regime had been.