I've mentioned before on other threads about some Muslim areas in the UK being no go areas for white English people, and while a lot of the liberal left say it's a myth, I can guarantee that it isn't as the city I live in as a couple of those areas.
These aren't areas that white people just don't want to go, it's places where when we do go, we are left to feel uncomfortable and are given the impression that we're not welcome. One instance was stopping for petrol, only for the pump not to be turned on, and be told that due to a delivery mix up, they wouldn't be getting any more petrol for a few days so what they did have was being saved for their local community. Basically it was a Muslim only petrol station.
As for taking over, there are a lot of towns and cities these days that do have Muslim mayors and elected members if parliament, and while they aren't exactly taking over so to speak, they are slowly getting a foothold in power. That isn't a bad thing as such, but if they are using their influence to protect and prioritise Muslim only beliefs, then we're going to have a problem very soon.