All cars that emit less than 100g/km of CO2 and meet Euro V emissions standards will get a 100% exemption from the London Congestion Charge.
All fully electric and plug-in hybrid vehicles that are able to run under battery power alone will also be given a 100% exemption under new regulations that come into force on January 4.
However, register a vehicle under the existing regulations by December 24 and you'll continue to receive the discount until December 2012.
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