| Category |
| 0 - Broad Gauge - Steam Locomotive |
| 0d - Broad Gauge - Diesel Locomotive |
| 0e - Broad Gauge - Electric Locomotive |
| 1 - Mainline - Steam Locomotive |
| 1d - Mainline - Diesel Locomotive |
| 1e - Mainline - Electric Locomotive |
| 2 - Std Gauge - Steam Locomotive |
| 2d - Std Gauge - Diesel / Petrol Locomotive |
| 2e - Std Gauge - Battery / Electric Locomotive |
| 3 - NG & Mono - Steam Locomotive |
| 3d - NG & Mono - Diesel / Petrol Locomotive |
| 3e - NG & Mono - Battery / Electric Locomotive |
| 4 - Miniature - Steam Locomotive |
| 4d - Miniature Diesel / Petrol Locomotive |
| 4e - Miniature Battery / Electric Locomotive |
| 5 - Powered Coaching Stock -Steam |
| 5d - Powered Coaching Stock - Diesel |
| 5e - Powered Coaching Stock - Electric |
| 5l - Powered Coaching Stock - Light Rail Cars & Trams |
| 5t - Tube Stock |
| 6 - Pre-Group Passenger Coach |
| 6a - Pre-Nat Passenger Coach |
| 6b - BR Passenger Coach |
| 6c - Overseas Passenger Coach |
| 6f - Funicular - Loco or Passenger Coach |
| 6n - Non Std Gauge Passenger Coach (NG&Mins) |
| 7 - Pre-Group Non-Passenger Coach |
| 7a - Pre-Nat Non-Passenger Coach |
| 7b - BR Non-Passenger Coach |
| 7c - Overseas Non-Passenger Coach |
| 7n - Non Std Gauge Non-Passr Coach (NG & Mins) |
| 8 - Rail Cranes |
| 8a - Track Machines |
| 8b - Small Plant & Road Railers |
| 8c - Overseas Plant |
| 8m - Miscellaneous Plant inc. Trollies & Trailers |
| 9 - Private Owner Wagons |
| 9a - Pre Group Wagons |
| 9b - Pre Nat Wagons |
| 9c - BR Wagons |
| 9d - Overseas Wagons |
| 9m - Miscellaneous Other British Wagons |
| 9n - British Non Std Gauge Wagons (NG & Mins) |