Which British nationalized industries were early users of operations research?

Following the conclusion of World War II, several nationalized industries in Britain became early adopters of operations research as practitioners transitioned from military service into government and industrial roles.1

The primary nationalized industries that began utilizing operations research shortly after the war included:

• Coal: The National Coal Board established one of the first industrial operations research groups.1
• Electricity and Transport: Both sectors began implementing these analytical techniques shortly after the coal industry.1

While the British Railways system was a major nationalized entity created by the Transport Act of 1947, the historical record specifically highlights the broader transport and electricity sectors as early adopters of these scientific management methods during the post-war period.12