The core of the problem remains that the English have nowhere to expand, right? The question is why the English AI feels the need to expand beyond the cities they flip/conquer... Maybe you could point them in a less annoying direction with the Settler maps or something? Make northern Africa or something a desirable location to settle, or somewhere they will inevitably get taken over...
Right now they seem to favor areas belonging to other Civs. I wonder why some Civs (like the Russians) tend to turtle up as they do and not found any cities, while the English both build Settlers and use them. They will actually build ships, load those and send eastward!
The Celts certainly wasn't doing that when you had them in Gaul...
I honestly have no idea whatsoever what makes the AI do these bizarre things. Other than the Settler maps or the like.
In my own Russia scenario the AI is dead set against expanding into Siberia even if I spawn free Settlers for them. They first build any feasible city in European Russia, so that one could have to do with the continents being defined as different "areas" in the game.
edit: Ah, could it be that Rhye has coded the English AI to actually pursuit their UHV? They need to build a number of cities on every continent, right? So they are simply fulfilling the condition of founding cities in Europe, since you took away their home areas.
Right now they seem to favor areas belonging to other Civs. I wonder why some Civs (like the Russians) tend to turtle up as they do and not found any cities, while the English both build Settlers and use them. They will actually build ships, load those and send eastward!

I honestly have no idea whatsoever what makes the AI do these bizarre things. Other than the Settler maps or the like.

In my own Russia scenario the AI is dead set against expanding into Siberia even if I spawn free Settlers for them. They first build any feasible city in European Russia, so that one could have to do with the continents being defined as different "areas" in the game.
edit: Ah, could it be that Rhye has coded the English AI to actually pursuit their UHV? They need to build a number of cities on every continent, right? So they are simply fulfilling the condition of founding cities in Europe, since you took away their home areas.