§ Mr. Redwood
To ask the Secretary of State for Transport what the percentage energy loss is in converting the primary energy source into electrical driving energy for the modern electric train. 
§ Dr. Howells
In contrast to older electric units such as Mark Is, which lose up to 60 per cent. to 70 per cent. of the energy supplied to them when starting up and operating at low speeds, modern electric multiple units such as Networkers have electronic control systems designed to prevent any significant energy loss in the provision of traction.