Not necessarily. If the WALLIES are stuck in the low countries and France and Market Garden failed but the Russians are screaming through Poland and Czechoslovakia I could see them using the Bomb if they think it can cause a collapse in the West.
The Japanese didn't have many aircraft capable of reaching B29's at altitude partly due to the poor quality of aviation fuel available to the IJA and UJN at the end.
You seem to forget, if the allies were on the ground in Holland and France they would be able to escort the bombers all the way...
If the bomb had been available in 1944 then Germany would have been on the receiving end of the multiple nuclear weapons or if the invasion had taken longer to break into Northern Europe and they were outside the borders of Germany in 1945 then yes they would have used the bomb.
If it got...
It's something the British Army has trained for continuously since WW2. The issue is that urban areas differ from Northern to Southern Europe and different again in Africa or South America etc with different construction methods, housing layouts etc.
Israel I suspect has a more limited range...
You also don't know the impact SAC EW will have on Russian C3 , plus SAC and TAC will be going after Russian command nodes and bases around the periphery of the Soviet Union further degrading intercept efforts.
SAC had a lot of tankers so they could fly bombers deep into the Soviet Union. The US also had a lot of bases around the periphery of the USSR including access to bases in Iran, Turkey, Libya the UK, Iceland, Pakistan and bases in WESTPAC to attack targets in the Eastern Soviet Union, SAC had...
The project was massively over budget and if the Olympus engines had continued to suffer from resonance issues it would never have achieved squadron service. Though politics were an issue.
Much as I loved the TSR2, it had issues. They had problems with the rapid throttling causing vibration, they had to delay flight tests as the undercarriage was showing some issues when landing and a lot of the electronics were either not working correctly, the other issue was maintenance issues...
Plus the UK wanted to charge an eye watering amount for the SMLE tooling. It's why Australia bought all their tooling from Westinghouse at a significant cost benefit even after paying the tariffs for imports into the Empire.
9mm Parabellum is the best choice though, like all cartridges it's a compromise though historically it seems the best choice, it's powerful enough to be effective but not so powerful it's users need wrists of steel to use it in a pistol.
They did make a some EM2's in 7.62 x 51mm , in one of the earliest Forgotten Weapons Ian got to shoot one that made it to the US. The UK MOD concluded that the action would require a redesign to handle the extra-power so they abandoned the design and picked the FAL instead...