Vehicle Excise Duty
In 2006 mayor Ken Livingstone proposed variable charges based on CO2 emission rate Vehicle Excise Duty bands. Charges would be reduced or eliminated for "Band A" vehicles, but would be increase it to up to £25 a day for the most polluting "Band G" vehicles. Consultation on these proposals began in August 2007 and ended on 19 October 2007. On 12 February 2008 TfL announced that they would introduce a new charging structure for vehicles entering the congestion zone, based on potential CO2 emission rates on 27 October 2008 following the imminent mayoral elections. The main change would be the introduction of two new fees: