The British Railways Mark 1 CK, built from 1951 onwards, had four First-class and three Third-class (Second-class from 1956) compartments, with a vestibule separating the 1st and 2nd sections, and a sliding door (usually fixed open) to divide the corridor.
Composite material | Northeast Corridor | Island Eastern Corridor | Capitol Corridor | Wakhan Corridor | Pan-European Corridor X | Composite video | composite video | Ceramic matrix composite | Shock Corridor | Polish Corridor | East-West Corridor | Central Corridor Rail Line | Blackstone River Valley National Heritage Corridor | Alameda Corridor | Aero Composite Technologies | West Berlin Air Corridor | U.S. Route 48 (Corridor H) | Trans-Texas Corridor | Standard Corridor | Springwater Corridor | Red Rock Corridor | Quality Bus Corridor | Polish corridor | Persian Corridor | Pan-European corridor X | Pan-European Corridor IV | Northwest Corridor HOV/BRT | Northeast Corridor Line | Nasdaq Composite |