'Locomotives 2021' is the definitive guide to all locomotives that operate on Britain's national railway network and the Eurotunnel network. It contains a complete list of all locomotives in service with details provided for every loco's owner, operator, livery, depot allocation and name. The book also includes technical data for every class of locomotive and an overview of the structure of Britain's railways today, including details of all franchised passenger train operators, open-access operators and freight train operators.