This comes as the NHS Purchasing and Supply Agency, which arranges the energy contracts for 85 per cent of NHS organisations in the UK, revealed it expects NHS costs for gas and electricity to be almost £430 million in 2008/9, a £165 million increase on the previous year.
The sharp rise in prices has led many health trusts to predict overspends.
These include £2 million at Pennine Acute Hospitals NHS Trust and £1 million at East Sussex Hospitals NHS Trust.
According to the Carbon Trust, the body paid by government to help firms reduce their carbon emissions, just a fifth of trusts had signed up to its programme to help hospitals cut bills through lighting, heating, insulation and transport assessment.
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