Feudalism depends on land ownership, and the agricultural productivity of North Africa was very much dependent on the massive Roman irrigation systems. Have those maintained and you might see feudalism arise.
Okay, let's say that in the aftermath of Albert's death, Victoria loses all interest in the crown and Britain becomes a Republic. What are the hoards thoughts and ideas on this?
I once had an idea for a Japan split between a Christian "Kingdom of Japan" based on Shikoku and Kyushu with a maritime focus and a Ikko Ikki theocracy on Honshu.