Lots of things. I assume that by no Nazi Party, you mean democracy in Germany survives.....
No PLO for a start. Germany with a weak democracy, possibly socialist or left wing. Poland closer to Britain, Russia weaker, no transatlantic alliance, no UN.
Has major implications in Asia....
Britain and Europe more reluctant to de-colonise.....more drawn out process.
Europe would have to co-ordinate better, no fragmentation and internecine bickering.
Britains descent still inevitable, but their cash reserves are better