In a cavernous concrete warehouse on an industrial estate outside Margate in Kent, an enormous screen flickers, day and night, telling the times of train services from north London to Manchester Piccadilly and Glasgow Central and Tring.
Whether or not anyone is there to see it, the 22-metre-wide board never stops flashing up live, genuine updates of departures by West Midlands Railway or service disruptions on Avanti West Coast services.
