Amazing achievement.

I did some work for Apricot at their Glenrothes factory around 1985-87. In my memory they went heavier on GEM than Windows. I never saw an Apricot running Windows prior to the PC-compatible models.

That's what I've heard, too! But apparently there even was an effort to port Windows 2.11 to XEN, though I have no idea whether it was ever completed.

The initial Apricot model came with GSX, I don't think there was a GEM driver for the 800x400 screen.