I have to say, it's really difficult to search for London. I got a ton of results from various boroughs from London, I got some London from Arkansas, I never got London proper.
If I type "london" and hit return, I end up on the unfiltered "Latest" page.
That seems something happening in quite some other apps, missing the obvious thing that when I as a tourist search for "London" I definitely don't care/don't know about Brixton, Leyton or Thingamajig. I'd be looking for the Big Ben and the Tower and other such tourist traps. If I wanted some hidden treasure in Crystal Palace then I'd have searched for that.
If I type "london" and hit return, I end up on the unfiltered "Latest" page.