The British Transport Docks Board (BTDB) was a nationalised industry, managing former railway-owned docks in Great Britain. It was created by the Transport Act 1962 and abolished by the Transport Act 1981, which provided for its privatisation as Associated British Ports. The business had its origins in the ports developed or acquired by the private railway companies. These passed to the British Transport Commission on nationalisation in 1948 and were organised under its Docks and Inland Waterways Executive.