London mayor Sadiq Khan is to target thousands of minicab drivers with a new congestion charge in a bid to cut pollution.
Private Hire Vehicles currently avoid the daily £11.50 fee for driving in central London.
But City Hall plans to lift the exemption to coincide with London's new Ultra Low Emission Zone next Spring.
The Conservatives accused Mr Khan of 'hammering' drivers to plug a £1bn black hole in Transport for London's finances.
Only so-called 'zero emission' minicabs will be able to claim a Cleaner Vehicle Discount after April 8th 2019.
TfL estimates fewer than 1,000 of London's 88,000 PHVs will be eligible for the discount.
Transport bosses predict the new toll will force around 8,000 minicabs a day out of the central London C Charge zone.