CLASS 502
| Vehicle type: | DMBS | TS | TC | DTC |
| Number range: | 28311-28369 | 29545-29594 | 29812-29820 | 29866-29899 |
| Introduced: | 1939-41 | 1939-41 | 1939-41 | 1939-41 |
| Built by: | LMS Derby | LMS Derby | LMS Derby | LMS Derby |
| Vehicle length: | 66ft 6in | 66ft 6in | 66ft 6in | 66ft 6in |
| Height: | ||||
| Width: | 9ft 5in | 9ft 5in | 9ft 5in | 9ft 5in |
| Seating: | 88S | 102S | 53F/29S | 53F/29S |
| Internat layout: | 2+3 | 2+3 | 2+2F/2+3S | 2+2F/2+3S |
| Gangway: | No | No | No | No |
| Toilets: | No | No | No | No |
| Weight: | 41 tons | 24 tons | 24 tons | 25 tons |
| Brake type: | Air | Air | Air | Air |
| Bogie type: | ||||
| Power collection: | 630V dc third rail | 630V dc third rail | 630V dc third rail | 630V dc third rail |
| Traction motor type: | 4 x EE 235hp | - | - | - |
| Horsepower: | Total - 940hp | - | - | - |
| Max speed: | 70mph | 70mph | 70mph | 70mph |
| Coupling type: | Screw | Screw | Screw | Screw |
| Multiple restriction: | Within type | Within type | Within type | Within type |
| Door type: | Bi-parting sliding | Bi-parting sliding | Bi-parting sliding | Bi-parting sliding |
| Notes: | These vehicles were either downgraded to TS and seated 82S, or rebuilt as additional DTC seating 47F/29S |