The energy regulator Ofgem has announced a higher-than-expected increase in the energy price cap with energy bills rising by £111 for a typical household per year. The announcement follows the January energy price cap increase,

The energy regulator Ofgem told BBC's Money Box that it is writing to chief executives demanding to know how many people have been sent "back bills". Back billing is when customers receive new bills for energy used longer than 12 months before - a practice that was banned seven years ago.

Energy prices are rising yet again after Ofgem hiked the cap by 6.4%. Annual bills for electricity and gas are estimated to reach around £1,849 for the average household in England, Scotland and Wales from April 1.