Think of it this way: as a windfarm operator you know your costs and you know your expected amount of energy produced. But you don’t know the precise timing and therefore the market value at generation time.

From the first two you can calculate what you need in terms of £/MWh (include whatever profit you want in there). Now you can go to the government and bid that price in the auction. If you win, you have a safe profit and all risk (and upside potential) now lies with the government. As GP said, in the case of 2022 you would have lost out on revenue. But that’s the price foe guaranteed margins

The CfD part is a technical detail. It ~ doesn’t matter whether you first sell the energy and then go to the government for reimbursement. Or whether you sell the energy to the government which then handles the follow up sale.

What I’m not sufficiently familiar with is whether you _have_ to go to such an auction (i.e. whether the auction also is the mechanism of capacity planning) or whether you are free to bypass this system and just hook up your wind park and carry the risk yourself. But functionally this is an insurance scheme for profits, with a market based pricing system