The Energy Secretary Edward Davey has defended the 'contracts for difference' telling ITV News Business Editor Laura Kuenssberg that it is not a subsidy by another name.
There are questions over a minimum price guarantee having to be underwritten by the tax-payer and acting as a subsidy.
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Savers into the new scheme can expect rates as high as 4 per cent from some banks.
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Strong performance from world number 100 meant Great Britain very nearly dominated day one of the competition.