 The PTR&DCo was absorbed by the Great Western Railway on 1 January 1922.Nationalised in 1948 by the Labour government of Clement Attlee, ownership of the docks passed to the British Transport Commission, under its Docks and Inland Waterways Executive.The Transport Act 1962 abolished the Commission and distributed its assets to five successor bodies, with the .nationalised British Transport Docks Board inheriting the dock undertakings, other than harbours used primarily by railway steamer services, including Port Talbot.