Ofgem warns of blackouts as it predicts grid's spare capacity could fall to zero

Regulator says demand-supply cushion risks being wiped out in 18 months, prompting consultation on further subsidies to keep power stations open
The energy regulator has issued a new and more alarming warning about the potential for blackouts, saying Britain’s spare capacity margin could dwindle to zero as early as next year. The prediction from Ofgem has forced the infrastructure operator, National Grid, to consult on another round of subsidies to encourage companies to keep power stations op