The trains were nationalised by the Tory government in 2020, and they also abolished franchising later that year. They also began to set up Great British Railways in 2021. All that’s happening now is the contracts are being withdrawn as they reach their break points.
Steel has not been nationalised. The government has taken over the funding of redundancy payments and retraining for the shut down private sector Tata furnaces in Port Talbot, and has taken steps to force the owners of British Steel to keep the idle furnaces in Scunthorpe burning.
There has also been no nationalisation in the energy sector. Great British Energy is set up as a way to subsidise projects created and run by the private sector and other public bodies. It will not generate, distribute or retail energy.