Amerada Gas & Electricity

Speaking to Scottish business leaders, the prime minister was also upbeat on the subject of the economy.

Many low-income families are being hit by unfair premiums for their fuel, the group has suggested.

The two firms' bill hikes are both in effect from today.

Rebel MP Frank Field wishes to mobilise backbench support in encouraging the government to help poor customers.

In an interview, John Hutton appears to have ruled out the possibility of the government imposing windfall taxes on gas and electricity firms.