I'll explain it to you, it's very simple... The private suppliers (Suez etc) had to raise their prices because the price of oil and gas rose. EDF is based on nuclear. So we're in a situation where EDF can ignore the reality of the market thanks to subsidies from the taxpayer. (my paraphrase from memory, emphasis mine)
It made me want to scream. In the long run, we're all dead. John Maynard Keynes