Prince Charles’ latest published accounts show he paid less tax last year while earning £1m more by off-setting his payments to HM Revenue & Customes with a series of green purchases, including the convesion of his cars to run on bioethanol and installing woodchip boilers in his home.

The Prince's investment in green electricity supplies and further reduction in travel-related emissions enabled him to claim his household had generated 18% less CO2 than the year before, The Independent reports.

Part of the reduction was achieved by converting his range of Jaguars, Audi and Range Rover to run on biodiesel made from used cooking oil, while Prince Charles's Aston Martin has been converted to run on surplus wine from English vineyards.

While his advisers claimed this represented a huge success in his battle against climate change the accounts also revealed Prince Charles was able to use his ‘green expenditure’ to ensure he paid less income tax on revenues which increased by 7% to £16.3m and which grew more than £360,000 to £8.3m.

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