Looking at the mission map for 2022, in general there's a clear difference between the typically higher numbers in inner London boroughs and the lower numbers of the more rural wider boroughs of Greater London.

Source: https://www.mylondon.news/news/health/shocking-new-map-shows-how-27019245

Meanwhile in London, Mayor Sadiq Khan's plan to increase ULEZ to all outer London boroughs - forcing Londoners to pay £12.50 a day to drive around- has been blasted as relying on data that's 'complete nonsense.'

Source: https://www.dailymail.co.uk/news/article-11783739/How-authoritarian-eco-plan-slice-city-5-zones-latest-bid-eradicate-drivers.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

Mr Khan, the Labour incumbent in City Hall, plans next month to widen the £12.50 daily charge for vehicles which fail to meet emissions standards to all London boroughs, taking it beyond the capital’s north and south circular roads.

Source: https://www.alloaadvertiser.com/news/national/23674105.sunak-urged-drop-unpopular-expensive-green-pledges-ahead-election/?ref=rss

The Ulez zone expanded on August 29 to encompass wider London boroughs.

Source: https://www.independent.co.uk/news/uk/home-news/angry-driver-ulez-opposition-numberplate-b2414796.html