It's been like that for decades. I was there a few weeks ago, seemed no different. Most Indian restaurants in the south of England, if not the UK are run by Bangladeshis, nothing new about that.
Doesn't help generally when people say "the cuntry is going down hill, I'm gonna move abroad" that cracks me up. Put it this way, if something terrible is coming, which it has been since I've been born apparently. I'm yet to see owt but immigration from all over the world and that is human nature for various reasons. IF that something happens, I will be right here to defend my space and my cuntry