Maybe. If it doesn't, I definitely know what will. This....
White Britons 'could be minority by 2066'
No way will the monarchy survive multiculturalism, at least not the monarchy that exists today. And, if any country falls to the new caliphate, it won't be Spain but the British Isles. You could be looking at the House of Saud, British style.
Hmmm, I can remember as a child in the 1970’s/early 80’s reading how Britain would be 25-50% black by 2020. And here we are in 2010 the entire ethnic British population is about 8%. Thats everyone without a white face, inc non white foreigners and mixed race.
Sorry, but I tend to ignore these studies. Like other studies in other fields, they all contradict each other and give different numbers.