The energy sector is already dominated by the government. They set the market, set regulations, and determine if new power stations can be built. For offshore

The energy sector is already dominated by the government. They set the market, set regulations, and determine if new power stations can be built. For offshore wind they own the seabed and give development rights. Any nationalisation would still have to depend on the same kind of expertise that already exists in the industry. They could how new developments are financed and use national debt. But beyond that I am not sure it would actually make much difference.