Different contracts sold at different times will obviously be on different terms.
It's not a free market and that's because our govt pushed so hard towards green energy. It's the cost of running before we can walk.
Everyone thought it was a good idea at the time because nobody thought there was any likelihood of the gas we need until renewables are ready becoming so scarce.
There's nothing wrong with moving towards greener energy, the contracts part was poor yes but at least now the infrastructure is built and ready. We should be moving towards more renewables combined with nuclear. Wind and tidal should be good sources for us given we're an island. I was disappointed they didn't build the tidal lagoon in Swansea, that was the type of project we should have got ahead of and then sold some of the design/expertise abroad after.
It's the same with nuclear really, EDF (now the French government) building Hinckley Point C - I predict there's going to be a big mess when it turns out they're making a nice profit of the UK tax payer and subsidising their own citizens prices with it. We should majority own the plants ourselves and again the reactor designs can be sold afterwards.