"Running of 40 compound engines on Midland Division, Feb-Mar 1931" file. The file includes train availability diagrams for 40 Class 4P (Compound) 4-4-0s on Midland Division, Feb-March 1931, 24 ex-LNWR "Claughton" 4-6-0s on Midland Division, Dec 1930-Jan 1931, 9 ex-LNWR "Claughton" 4-6-0s on Western Division, Dec 1930-Jan 1931, 20 Class 5X "Claughton" 4-6-0s (Walschaets & Caprotti valve gear) on Western Division, Dec 1930-Jan 1931, 13 "Royal Scots" Class 4-6-0s on Western Division, Dec 1930-Jan 1931 and a summary sheet.