Londonwide Ulez has enabled me to ditch pay-per-mile road charging plans, reveals Sadiq Khan 

Sadiq Khan says he ditched plans to introduce a road-user charging scheme because he was able to expand the Ulez to the Greater London boundary.

https://www.standard.co.uk/news/london/sadiq-khan-ulez-roaduser-charging-scheme-pay-per-mile-b1114333.html