[user104658]

Originally Posted by Marsh.

The last 50 years the Doctor has had an obsession with the white population of London, England in the modern day.

He spends a lot of time in the 21st century for someone who can go anywhere and anywhen.

True although I'd actually say that's been significantly less in the Smith and Capaldi eras... And probably had more to do with the cost of doing anything else . Sets, prosthetics and CGI can be done convincingly and relatively cheaply these days so there's a lot more future / space stuff.

All of his companions tend to be young and from contemporary England though. That is a bit odd. I mean, even Scottish Amy was only Scottish by accent - living in an English town.