SIR – Buried in Oxgem’s list of reasons for rising energy prices under the heading of ‘Investments’ is the £1.1 billion subsidy paid to renewable energy producers in 2010.

Added to consumers’ electricity bills, this by no-means-trivial sum produced 7.4 per cent of our electricity supply in that year, the majority of which came for waste either by way of incineration or by the burning of methane produced in landfill sites.

Only three per cent was produced by wind power, according to the figures produced by the Department of Energy and Climate Change.

Max Hey, Fairway Grove, Bradford