For reference, we barely covered world war 2 at all. The latest thing I recall learning about in history at school was the weimar republic and the leadup to world war 2, but they didn't attempt to teach what actually happened dring the course of the fighting. (presumably because it was far too complicated and all over the world to paint a consistent picture to schoolchildren) - It was mainly about the political situation in germany such as the beer hall putsch and communist bavarian uprising.
It also has to be said I am relatively young and a lot of this occured around 12 years ago so older people may have a different picture from their schooling, but I have seen nothing that leads me to believe that - older people tend to have great respect for these things as well.
I think a lot of people in the UK are well aware of the Menin Gate at Ypres and their Last Post ceremony. There are so many places and incidents in history that they can't all be remembered with equal vigour. Some will be less prominent than others, it doesn't necessary mean they are forgotten.
Belgium would also rather not talk about its period of colonial genocide.
b.) Yes.