Surviving First Generation DMU vehicles not in preservation - as at April 2005
| Vehicle No. | Unit No. | Orig. No. | Type | Class | Status | Owner/Function | Location | Comments |
| Operational Vehicles | ||||||||
| 55020 | 121 020 | ex-977722 | MBS | 121 | Op | Chiltern Railways (Mainline service) | Aylesbury | Blue with silver stripes, formerly 960 002 |
| Departmental Vehicles | ||||||||
| 977392 | 901001 | 50167 | MBS | 101 | D | Network Rail (Ultrasonic Test Train) | Reading | With 975091 or 999602 centre car |
| 977693 | 901002 | 50222 | MBS | 101 | D | Network Rail (Test Unit) | Derby RTC | |
| 977694 | 901002 | 50338 | MC | 101 | D | Network Rail (Test Unit) | Derby RTC | |
| 977391 | 901001 | 51433 | MBS | 101 | D | Network Rail (Ultrasonic Test Train) | Reading | With 975091 or 999602 centre car |
| 977987 | 960 301 | 51371 | MBS | 117 | D | Chiltern Railways (Water Jet Unit) | Aylesbury | Green |
| 977992 | 960 301 | 51375 | MS | 117 | D | Chiltern Railways (Water Jet Unit, centre car) | Aylesbury | Green, cab removed. Ex-preservation |
| - | - | 51411 | MS | 117 | D | Chiltern Railways (source of spares) | Aylesbury | Regional Railways livery |
| 977988 | 960 301 | 51413 | MS | 117 | D | Chiltern Railways (Water Jet Unit) | Aylesbury | Green |
| 977723 | 960 021 | 55021 | MBS | 121 | D | Network Rail (Route Lnr/Sandite) | Aylesbury | Old Railtrack livery |
| 977873 | 960 014 | 55022 | MBS | 121 | D | Chiltern Railways (Route Lnr/Sandite) | Aylesbury | Blue/grey |
| 977858 | 960 010 | 55024 | MBS | 121 | D | Network Rail (Route Lnr/Sandite) | Aylesbury | Maroon |
| 977859 | 960 011 | 55025 | MBS | 121 | D | Network Rail (Balfour-Beatty Video Survey Unit) | Ashford | Railtrack blue/green |
| 977975 | 960 302 | 55027 | MBS | 121 | D | Network Rail (Severn Tunnel Emergency Train) | Severn Tunnel Jn | |
| 977860 | 960 012 | 55028 | MBS | 121 | D | South West Trains (Route Lnr) | LNWR (Crewe) | Being converted, April 2005 |
| 977968 | 960 xxx? | 55029 | MBS | 121 | D | Network Rail (GTRM Video Survey Unit) | Rugby | GTRM, as 120 129 |
| 977866 | 960 013 | 55030 | MBS | 121 | D | Network Rail (stored) | Aylesbury | NSE |
| 977976 | 960 303 | 55031 | MBS | 121 | D | Network Rail (Severn Tunnel Emergency Train) | Severn Tunnel Jn | |
| 975042 | 960 015 | 55019 | MBS | 122 | D | Network Rail (Route Lnr/Sandite) | Aylesbury | Network Rail yellow |
| Vehicles awaiting disposal by ROSCO | ||||||||
| 51350 | MBS | 117 | S | Angel Trains | MoD Shoeburyness | 117 701 Reserved for Chiltern Railways, NSE livery | ||
| 51366 | MBS | 117 | S | Angel Trains | MoD Shoeburyness | 117 706 Reserved for Chiltern Railways, NSE livery | ||
| 51383 | MS | 117 | S | Angel Trains | MoD Shoeburyness | L704 Reserved for Chiltern Railways, NSE livery | ||
| 51408 | MS | 117 | S | Angel Trains | MoD Shoeburyness | 117 706 Reserved for Chiltern Railways, NSE livery | ||