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| Operator: | United Automobile | Fleet No: | BU501 |
| Chassis: | Bristol MW5G | Chassis No: | 135.005 |
| Body: | ECW B45F | Body No: | 9819 |
| Nov 57 | In service with United Automobile Services Limited, Darlington (BU501) |
| Nov 64 | Fleet number changed to U501 |
| May 68 | Converted to OMO |
| Jan 69 | Fleet number changed to 2501 |
| Jun 74 | Out of service with United Automobile Services Limited, Darlington (2501) |