Roman Britain had a multi-cultural population - including people with African and Middle East origins. This can, yay science! be proven by bioarchaeology - read more about it here.
While we're on the topic of Britain, there's a petition going on to remain in the EU, and it's being signed at quite a rate. You can have a look at the live update info site here (and marvel at the number of areas that are still voting "leave", too!).