Porsche challenges C-charge rise
Luxury carmaker Porsche is to challenge plans to increase London's congestion charge to £25-a-day for some vehicles.
The firm said it intended to ask for a judicial review into the price changes, which come into force in October.
Porsche says the new rules, which affect the highest polluting vehicles, are "disproportionate" and will not decrease emissions in central London.
Transport for London (TfL) predicts up to 22,000 cars will no longer come into the zone when the new fee comes in.
Under the plans, which will be introduced on 27 October, cars with the lowest carbon dioxide (CO2) emissions will get a 100% discount on the charge.