British Railways Pocket Book 3: Diesel Multiple Units is divided into four main sections as follows:
- Diesel Mechanical & Diesel-Hydraulic Multiple Units
- Diesel Electric Multiple Units
- On-Track Machines
- Codes
The book has been completely updated to incorporate all the latest rolling stock changes and now also includes the following completely new classes:
- West Midlands Trains Class 196
- Transport for Wales Class 197
- Transport for Wales Class 231
88 pages including 16 pages of colour illustrations.