1 - 12 Registers
13 - 20 Boiler registers, etc.
21 Building programmes
22 - 28 Shed allocations
29 - 35 Locomotive/tender numbering
36 Exhibitions
37 Great Central Railway
38 - 39 Gresley Society/A3 Pacific Class locomotives
40 Hull area
41 Hull & Barnsley Railway
42 Rosedale Branch
43 - 48 Miscellaneous