The NHS has spent almost £65million on making a whole fleet of ambulances Ulez compliant.
NHS ambulance services in southern England have been made temporarily exempt by Transport for London (TfL) whilst the health service changes over from non-compliant vehicles.
Freedom of Information requests reveal that each vehicle costs £140,000 to replace.
The NHS has until October 2025 to replace the ambulances.
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The fleet stands at 534 – 279 from the South East Coast Ambulance Service and 255 from the London Ambulance service.
Tory chairman Richard Holden said: “These revolutions are shocking - even by Mayor Khan's standards.
“Taxing hardworking people to simply drive their cars was bad enough - but Mayor Khan hammering our NHS ambulance services with tens of millions of pounds of extra cost, just to do their job and get to patients to hospital is downright disgraceful.
“The taxpayer should not be forced to swallow the cost of another one of Sadiq Khan's ideologically obsessive vanity projects.”