Families face shock 20% rise in heating bills as gas giants cash in on Big Freeze

The Daily Mail reports:

Families face record winter gas bills averaging £360 as power companies reap a huge windfall from the big freeze.
The 'big six' energy suppliers have refused to pass on a steep fall in wholesale prices to customers.
They are collecting a profit bonanza of £846million in a single month by charging over the odds to keep homes warm.
Householders have had no choice but to turn up the heat to cope with the coldest spell in 30 years, with snow and ice blanketing the entire country.
Domestic demand for gas over the last month is predicted to be 60 per cent higher than in a normal winter.
This increased consumption will result in average bills of £360 for the three-month period from November through to the end of January, compared with £300 a year ago.
Greedy suppliers decided to reduce the tariff to customers by less than 10 per cent - even though the wholesale price of gas came down by some 60 per cent between 2008 and 2009.