Families are considered to be in fuel poverty when they have to spend more than 10% of their incomes on keeping their homes warm.
Campaigning organisation the Fuel Poverty Action Group said that nearly half of the UK's fuel poor households are pensioners, a third contain people with some sort of disability or illness, a fifth contain a child aged five or under and one in 10 house someone aged 75 or over.
The Fuel poverty ratio is therefore defined as: Fuel poverty ratio = fuel costs (modelled consumption x price) ÷ income
In the calculation of this ratio, the fuel consumption is modelled, to ensure the household achieves the satisfactory heating regime.
Therefore, if the dwelling is actually heated to a temperature below the level defined as being satisfactory, the estimated bill for that household will be higher than the actual bill and vice versa.
More top news
The 10-year-old boy killed in an accident in a Topshop store died after a queue barrier fell on his head, an inquest has heard.
A bid to make it illegal for firms to require women to wear high heels at work will be debated by MPs, the Government has said.
Alexander Isak is the biggest thing to come out of Swedish football since Zlatan Ibrahimovic, but he doesn't mind, says Dickson Etuhu.