The cost of green taxes on energy bills will more than treble over the next five years, the official economic forecaster has said.

The Office for Budget Responsibility said that cost of the subsidies, which are levied on household and business energy bills, is expected to rise from £4.6billion in 2015-16 to £13.5billion in 2021-22.

It comes after British Gas claimed that green taxes will cost households £150 from next year as it blamed the Government for a huge rise in electricity bills.

British Gas forecast that the cost of the subsidies, which are used to fund renewable sources of energy such as wind and solar, will hit £149 next year having risen by by two-thirds since 2014.

It announced that 3million of its customers on a dual fuel standard variable tariff will see their bill rise by an average of £76 to £1,120.

The figures will add to mounting tensions in the Conservative Party over the current push for renewable energy.

Michael Gove, the Environment Secretary, has signalled that more wind farms may need to be built to power a new generation of electric cars under Government plans to ban the sale of diesel and petrol vehicles. Asked about wind energy, he said that "we have no alternative to embracing new technology".