ROCs are issued to electricity generators, which need to have certificates to cover a growing percentage of their electricity generation and are currently handed out uniformly to all renewable technologies. However, the publication claims energy minister Mike O'Brien re-banding featuring in draft proposals is designed to "accomplish more". Energy from the sun, marine power, the earth's heat, dedicated energy crops and from burning gas produced by anaerobic digestion will earn facilities two ROCs per megawatt hour (MWh) of electricity.

In his pre-budget report, chancellor Alistair Darling said he would extend the ROCs ten years until 2037 as part of a Government push to generate 15 per cent of electricity from renewable sources by 2020.

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