He said: said: “Clearly this is an incredibly serious situation which calls for nothing less than the grounding of the entire new Sleeper fleet until we have the full details of what went wrong.“No-one should be playing fast and loose with faulty brakes on our railways and Serco need to wake up to that fact and act now.”The Twitter account for the Caledonian Sleeper posted: “Our apologies to guests affected by the incident at Edinburgh this morning.“Our northbound service to Edinburgh Waverley overran the platform due to an earlier operational issue at Carstairs.“An investigation is under way into the cause of the incident but early indications are that there are no technical problems with the rolling stock. We have notified the relevant authorities.” An investigation has been launched after a new Caledonian Sleeper train overshot its platform by hundreds of yards amid calls for the train to be pulled from the tracks. The incident at Edinburgh Waverley station is being probed by the Rail Accident Investigation Branch (RAIB) after overshooting its platform at Edinburgh Waverley station.The train was brought to a halt by staff activating the emergency brake – stopping the train across a junction several hundred yards down the track.This blocked services to London, Dunbar, North Berwick and Tweedbank before the train could be returned to the platform, causing delays.A spokesman for the RAIB, said: “An RAIB inspector was deployed yesterday to gather evidence. We will use this information to decide any further course of action.” Serco, which operates the Caledonian Sleeper service apologised and said: “early indications are that there are no technical problems with the rolling stock.”Inspections of the train, which was introduced alongside the rest of the new fleet at the end of April, and the scene were conducted in an attempt to find the cause of the incident.In response, Transport Salaried Staffs’ Association (TSSA) general-secretary Manuel Cortes called for the entire fleet to be pulled from service. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily  Front Page newsletter and new  audio briefings.