 Àwọn wo ni àwọn ilé-iṣẹ ojú irin Big Four ní UK kí ìjọba tó sọ wọn di ti orílẹèdè : Awọn mẹrin nla ni London, Midland ati Scotland LMS, London ati North Eastern Railway LNER, Great Western Railway GWR ati Southern Railway SR 