Why are the consists made up of one piece of rollingstock for example of the Frieght services is only made of the plank wagons and same with passenger services made up of the maroon mk1s but in the 8f introduction the rollingstock such and the red and cream mk1s and other wagons such as the mineral wagons, vans and flat containers which all could be added to the service mode to make each service a little bit different.
