I did history GCSE as well in the mid 90s, and from what I can recall it was only 20th century history. I'm also pretty sure that the curriculum was split into

I did history GCSE as well in the mid 90s, and from what I can recall it was only 20th century history. I'm also pretty sure that the curriculum was split into several modules and the school got to pick something like 3 out of N modules to focus on.