Big six energy firms braced for government price crackdown

New rules are expected to be implemented as soon as next week, most likely in form of price cap on standard variable tariffs

Central heating systems are being turned off across the country as spring takes hold, but winter is coming for energy companies who have recently hiked bills for millions of households.

Theresa May said the energy market was "manifestly" not working after a flurry of price rises by the big six companies - British Gas, e.on, EDF, npower, ScottishPower, and SSE - and dozens of smaller suppliers.