See also: https://bathtrams.uk/electric-cars-are-not-the-answer-to-air-pollution-says-top-uk-adviser/

“…about 88 per cent of London’s road traffic emission now arises from vehicle brake and tyre wear and resuspension…”

Transport for London Report 10 http://content.tfl.gov.uk/travel-in-london-report-10.pdf …

see the bottom of page 12, and figure 6.22 and the following text on page 163:

“Although London now complies with limit values for PM10, continued reductions to
ambient concentrations will bring further significant health benefits. Achieving this is
however difficult, given that , with only limited
technological options for improvement currently available. In 2016, London’s road
traffic PM10 emission was effectively unchanged; some small reductions arising
from the natural turnover of the vehicle fleet were offset by increased emissions
reflecting the overall increase in road traffic levels. ”