The causes, and the effects of WW1 are taught intensively and well in most secondary schools, at KS3 and above, often incorporating visits to Ypres and the Menin Gate, and study of the war poets. I have seen students return chastened by the experience.
I was much saddened when the poetry of WW1 was removed from the GCSE Certificate by the powers that be, and replaced with something like "poetry from 1918.....(can't remember the detail) The power of that poetry cannot be underestimated.
Reflect, yes. Commemorate, yes. Be grateful, yes. Celebrate, no. It was a wasteful, dreadful war, and the media freedom which we so castigate today would surely have served its purpose had it been prevalent then!
To think that London, or anywhere else for that matter, does not belong to any one demographic