Falling demand and lower wholesale gas prices would cut power prices, research suggests. : Falling gas prices, low-cost imports and stable carbon prices will see wholesale power prices in the UK decline steadily through to 2022, according to new research. In a note to its clients, ratings agency Moody's said it expects that prices will fall from around £45/MWh today to £40/MWh in 2022. Graham W Taylor, senior credit officer at Moody's, said: "The forecast is driven in large part by our expectation that gas prices will fall in sterling terms.