The government’s eleventh hour £20 million budget boost for next month’s Contracts for Difference (CfD) auction will not significantly increase the chances of a successful exercise, says a new report that outlines how overhauling the renewables subsidy scheme’s rules could cut customers’ bills. Ministers increased the size of the budget allocated for Allocation Round 5 (AR5) of the CfD from £170 million to £190 million as part of its wider set of energy week announcements earlier this month. The results of the allocation round are due to be unveiled in early September.