Rolling stock companies

Rolling stock leasing companies (ROSCOs) own most of the coaches, locomotives and freight wagons that run on the rails, which they lease to train operating and freight operating companies, in accordance with the requirements for the services the latter wish to operate.

ROSCOs have replaced many of the older trains that were being used at privatisation with modern vehicles. They are often responsible for the heavy maintenance and overhauling of the vehicles they lease to train operators.

Leasing companies

Train builders

The companies listed below are builders of existing passenger trains for the British market.