Govia Thameslink Railway (GTR), the UK’s largest train operator, will be nationalised on May 31, 2026, as part of the government’s rail reform. The operator of Thameslink, Southern, Great Northern, and Gatwick Express will transfer to Great British Railways, with full integration expected by 2027. Passengers will see no immediate service changes, while employees retain job security. The move aims to create a unified, efficient, and sustainable national rail system.