Changes

;Instanter:A type of three link chain coupling with a special triangular-shaped middle link which provides sufficient slack for coupling, but when rotated through 90 degrees shortens the length of the chain, reducing the slack without the need to wind a screw.

;Internal User:Rolling stock used for the railway’s internal purposes (stores etc.) at one fixed location.

;Ivatt:Henry George Ivatt, Chief Mechanical Engineer (CME) of the London, Midland and Scottish Railway 1946-1948. CME of BR (London Midland Region) 1948-1951

;Johnson:Samuel Waite Johnson, Chief Mechanical Engineer (CME) of the Midland Railway 1873-1903

;WLA: Western Locomotive Association Ltd.

;WMSP:West Midlands Safari Park