| Last Checked or Updated 05 October 2025 |
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D431 | 50031 |  |
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| Photo: K. Connolly - Bristol Temple Medas 04/06/1976 |
| Loco Specific Information | |||
| Built By | English Electric at The Vulcan Foundry | ||
| Build Number | EE 3801 / VF D1172 | ||
| To British Rail / To Service | 01.07.1968 / 06.07.1968 | D431 | |
| TOPS Renumbered | 15.02.1974 | 50031 | |
| Time In Service | 23 years, 1 month | 8,431 days | |
| Engine Hours | 9,975 | ||
| Nameplate | Hood | Fitted | 28.06.1978 |
| First Noted Working Found | |||
| Works & Exam History | ||||
| 1 | Unknown | Entry Prior 08.03.1970 / Release Prior 14.06.1970 | ZC | Crewe Works |
| 2 | Light Repair | Entry xx.xx.xxxx / Release 09.02.1971 | ZC | Crewe Works |
| 3 | Light Repair | Entry Prior 27.06.1971 / Release 27.06.1971 | ZC | Crewe Works |
| 4 | Intermediate | Entry Prior 24.06.1973 / Release 08.09.1973 | ZC | Crewe Works |
| 5 | Light Repair | Entry Prior 07.04.1974 / Release Prior 19.05.1974 | ZC | Crewe Works |
| 6 | Light Repair | Entry Prior 22.09.1974 / Release Prior 24.11.1974 | ZC | Crewe Works |
| 7 | Light Repair | Entry Prior 23.05.1975 / Release Prior 08.06.1975 | ZC | Crewe Works |
| 8 | Light Repair | Entry Prior 06.11.1977 / Release Prior 05.02.1978 | ZF | Doncaster Works |
| 9 | Light Repair | Entry Prior 02.04.1978 / Release 31.05.1978 | ZF | Doncaster Works |
| 10 | Refurbishment | Entry 11.06.1981 / Release 13.11.1981 | ZF | Doncaster Works |
| 11 | Intermediate | Entry xx.xx.xxxx / Release 25.11.1985 | ZF | Doncaster Works |
| Last known working before and after a repair | |||
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| Last Working | |||
| Post Service | |||
| Withdrawn | 21.07.1991 | ||
| Condemned | 05.08.1991 | Wheels | |
| Identification Markings & Notes |
| Allocations / Sectors | |||
| Date | Area / Depot | Depot Code | Time Spent at Depot |
| 01.07.1968 | Allocated to Crewe Diesel | CD | |
| 08.05.1976 | Reallocated to Laira | LA | |
| 05.1980 | Reallocated to Old Oak Common | OC | |
| 05.1990 | Reallocated to Laira | LA | |
| Sector Code | Sector | ||
| 05.1987 | NXXA | Network SouthEast | |
| 30.09.1988 | NWRA | Network SouthEast - Thames & Chiltern | |
| 27.05.1990 | DCWA | Network SouthEast - Solent & Sarum | |
| 25.01.1991 | NWXC | Network SouthEast - West of England Reserve | |
| 03.02.1991 | NWXA | Network SouthEast - West of England | |
| Liveries | ||
| Date From | Notes | |
| 01.07.1968 | Standard British Rail Blue | |
| 11.1981 | Large Logo British Rail Blue, Grey Roof | |
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| Preservation | |||
| Preserved By | Fifty Fund Alliance | At | Severn Valley Railway |
| Photos | |
| Standard British Rail Blue | Nameplate |
| Photo: | |