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| Operator: | United Automobile | Fleet No: | BU506 |
| Chassis: | Bristol MW5G | Chassis No: | 135.020 |
| Body: | ECW B45F | Body No: | 9821 |
| Jun 58 | In service with United Automobile Services Limited, Darlington (BU506) |
| Nov 64 | Fleet number changed to U506 |
| Feb/Dec 68 | Converted to OMO |
| Jan 69 | Fleet number changed to 2506 |
| Jan 75 | Out of service with United Automobile Services Limited, Darlington (2506) |
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Owner : United Automobile BU506 Location : Not Known Date : Not Known
(C) Brian Botley |
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Owner : United Automobile 2506 Location : High Street, Redcar Date : August 1972
(C) Donald Hudson |