| Vehicle type: | DMBS | DTCL+ |
| Original number range: | 50339-50358, 51108-51127 | 56094-56113, 56300-56319 |
| TOPS class number: | 100 | 100 |
| Original classification: | 100 | 143 |
| Revised number range: | Note: 1 | Note: 2 |
| Classification: | DMBS | DTCL |
| Introduced: | 1957 | 1957 |
| Built by: | Gloucester RCW | Gloucester RCW |
| Vehicle length (over body): | 57ft 6in | 57ft 6in |
| Height: | 12ft 8 1/2in | 12ft 8 1/2in |
| Width: | 9ft 3in | 9ft 3in |
| Seating: | 52S | 12F/54S |
| Internal layout: | 2+3S | 2+2F/2+3S |
| Gangway: | Inner end | Inner end |
| Toilets: | Not fitted | 1 |
| Weight: | 38 tons 5 cwt | 25 tons |
| Brake type: | Vacuum | Vacuum |
| Power unit: | 2 x BUT (AEC) of 150hp per vehicle | - |
| Horsepower (total): | 300hp | - |
| Transmission: | Mechanical | - |
| Max speed: | 70mph | 70mph |
| Coupling type: | Screw | Screw |
| Multiple restriction: | Blue square | Blue square |
| Door type: | Slam | Slam |
| Special features: | ||
| Body structure: | Steel | Steel |
| Notes: | 1: Only vehicles 50351/353/355/356/358 renumbered to 53351/353/ 355/356/358 | Most later declassified to DTSL. 2: Only vehicles 56106/108/ 111/113 renumbered to 54106/108/111/113 |