B
NF
| Type: | B (LMSR) | B (SR) |
| TOPS Code: | NF | NF |
| Number range: | 31020-31932 | 201-399 |
| Introduced originally: | 1938-1950 | 1938-1953 |
| Built by: | LMS/BR Wolverton/Derby | SR Lancing, Eastleigh and Ashford |
| Vehicle length (over body): | 50ft 0in | 53ft 8in |
| Height: | 12ft 8 1/2in | 12ft 8in |
| Width: | 9ft 2in | 9ft 0in |
| Layout: | Van with central guards brake | Van with central guards brake |
| Toilets: | 0 | 0 |
| Weight: | 25-27 tons | 26 tons |
| Brake type: | Vacuum | Vacuum |
| Bogie design: | LMS 4-wheel | SR 4-wheel |
| Max speed: | 75mph | 75mph |
| Coupling type: | Screw | Screw |
| Heating type: | Steam piped, or electric wired, some fitted with stoves | Steam piped, or electric wired, some fitted with stoves |
| Door type: | Slam, two pairs per side, plusguards door | Slam, four pairs per side, plusguards door |
| Special features: | ||
| Notes: |
Last updated 26/04/06