Energy giants' failure to pass on £50 bill cut 'not acceptable', Greg Barker says Suppliers who have not passed the reduction on to those on fixed price tariffs have argued that those customers' tariffs were cheaper anyway. The £50 bill cut was a partial reversal of bill rises of more than £100 that were announced at the start of the winter, blamed in part on the rising costs of the Energy Company Obligation home insulation scheme. Suppliers have suggested that customers on fixed price tariffs would generally not have faced those increased costs in the first place. The green levies deal saw ministers agree to reform the ECO scheme as well as shift the funding of a scheme to help poor customers, the Warm Homes Discount, into general taxation. The reduction from the Warm Homes Discount will come in the form of a £12 rebate that will be passed on to all customers - including those on fixed priced tariffs - later this year. Separately, it emerged that the Treasury is considering reforming another controversial 'green levy', the carbon price floor. The tax on burning fossil fuels accounts for £5 on a typical household energy bill and is due to push up bills by a further £5 this year, rising to £50 by the end of the decade. Sources confirmed reports that the Treasury is considering heeding calls of manufacturers and consumer groups to 'freeze' the rate of the carbon tax, in a move that could be announced at the Budget in March.