Ofgem tells companies they should be as slow as passing on a recent 15% hike in wholesale prices as they were in passing on recent price falls
The regulator Ofgem has warned the big six energy companies against raising prices in spring, despite a 15% increase in their costs.
It said rising wholesale gas and electricity prices were largely to blame for driving costs upwards, along with renewable energy subsidies. But its chief executive, Dermot Nolan, said this was not an excuse for tariff hikes.