See: https://www.gov.uk/government/news/new-plug-in-grant-will-treble-number-of-greener-cars-on-britains-roads http://fleetworld.co.uk/news/2015/Dec/OLEV-confirms-400-pounds-m-extension-to-Plug-in-Car-Grant/0434022955 http://www.autoexpress.co.uk/car-news/consumer-news/93834/plug-in-car-grant-extended-until-march-2018