[taylorius]

I'd say so for sure. I've lived in London most of my adult life, and in my experience the air is a lot better than it used to be.

[input_sh]

Evidence: https://aqicn.org/historical#!city:london

Note that this shows Chinese Air Quality Index, which is different than EU AQI, which is different than US AQI, which is different than... you get the point. But at the end of the day they all use the same data.