The deadline to enter the UK’s largest ever renewable energy auction passed on Friday ahead of the award of a bumper crop of government-backed deals to advance huge offshore wind projects, amid warnings the price of power could tick upwards in the round – and with a significant chunk of capacity stuck in the planning system.

The month-long entry window for Britain’s fourth renewable energy contract-for-difference (CfD) round will be followed by a competitive process that could see developers of 12GW or more capacity secure guaranteed prices for the power they sell, including the largest ever offshore wind allocation seen globally.