Mk 1 Gangwayed Brake (BG), more usually known as a NAV. Built by Cravens Ltd in 1956. Lot No 30224. Weight 31 tons. Length 58ft. Purchased from Toton and arrived at NLR on 16th June 1988.

In the early days the NAV suffered some broken windows,
these
have since been replaced. It still carries the B.R. Blue and Grey.
| Builder | Cravens |
|---|---|
| Built | 1956 |
| Works Nº | M81031 M84031 |
| Type | BG - Gangwayed Brake |
| Weight | 31 tons |
| Diagram Nº | 711 (new NA501) |
| Lot Nº | 30224 |
| Length | 58ft |
| Seating | n/a |
| Made Redundant | - |
| Date Preserved | - |
| Current Condition | - |
| Current Home | NLR |
| Arrived NLR | 16th June 1988 |
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