Before the demise of the Birmigham Railway Carriage & Wagon Works three very similar orders were filled in the Type 2 & 3 range. Very similar in appearance and marked principally by internal differences - the Class 26's carried the 6LDA28A power unit, the Class 27's featured the uprated 'B' model, whilst the Class 33's carried an 8LDA28, the bigger power unit accomodated because the Southern Region didn't require train heating boilers to be fitted into the Class 33's.
The Classes initially were spread far & wide, the Class 26's split between the suburban services of Kings Cross and the Highland Lines. The Class 27's called the Midland mainline home, whilst a small batch graced Thornaby depot. Trouble with the North British products on the Scottish Region saw the entire Class 26 fleet quickly moved to the Scottish Region. A number of Class 27's also went north to fill in on the West Highland lines, it would be several more years before they too were all allocated to Scottish depots. The Class 33's were synonymous with the Southern Region, allocated to Eastleigh & Hither Green, though they were familiar sights on the inter-regional Bromford Bridge oil tanks and the infamous Cliffe - Uddingston cement workings over the ECML.
| Class 26's |
| Class 27's |
| Class 33's |
| The remains of 33036 rest at Slade Green July 14 1979. |