POWER company Eon has revealed it is raising average prices by nearly four cent for dual fuel customers.

Bosses say the increase will add £48 to the average dual fuel bill, and will come into effect on January 18.

The move means Eon is the last of the big six energy firms to increase prices, and takes account of the amendments to green and social levies, including some which were removed from fuel bills by the Government.

The firm revealed customers with just an electricity account will see prices rise by £20 a year, with gas only customers charged an extra £37.

Last week, the Government announced changes to green and social levies, which will mean customers from the big six will see a £50 average reduction in their bills.

British Gas will cut dual fuel bills by an average of £53 from January 1, with SSE expecting a dual-fuel saving of about four per cent before the end of March, equivalent to about £50.

Npower does not plan to increase energy prices before spring 2015, unless there are increases in wholesale costs or network charges.