BRITAIN’S households are being hit by obscure energy charges that are keeping bills at record levels, campaigners have warned.

A Warm This Winter report examined 14 charges that are being added to customers’ bills, such as “non-locational demand residual banded charges, available supply capacity charges, electricity systems operator internal allowances and ancillary services costs.”

Also hidden in the charges are “line losses,” which set out the amount of energy lost while transmitting electricity around the network.