Durham District Services was formed in August 1950 by four operators who were operating bus services in the Central and South Durham areas. These operators were:
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Express Omnibus Co (Durham) Ltd, Durham | ||
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ABC Motor Services, Ferryhill | ||
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Darlington Triumph Services Ltd, Darlington | ||
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Gilesgate Moor Garage, Durham |
Durham District Services merged with United Automobile Services in 1968 and all vehicles were transferred to UAS.

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For full details click here. |
| Fleet No | Reg No | In service | Out Service | Original Op | Remarks |
| DU504 | 504 FHN | Aug 65 | Aug 68 | UAS BU504 | |
| DU509 | 509 FHN | Aug 65 | Aug 68 | UAS BU509 | |
| DU535 | 935 JHN | Aug 65 | Aug 68 | UAS BU535 | |
| DU536 | 936 JHN | Aug 65 | Aug 58 | UAS BU536 | |
| DU573 | 573 LHN | Jul 66 | Aug 68 | UAS BU573 | |
| DU575 | 575 LHN | Jul 66 | Aug 68 | UAS BU575 |

Vehicles transferred to United Automobile on merger in Aug 68
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Durham District |
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Durham District Services |

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Barnard Castle |
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Darlington (closed 1961 - vehicles transferred to UAS Depot) |
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Durham (closed 1961 - vehicles transferred to UAS Depot) |
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Ferryhill |
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Middlebrough (UAS Garage) |
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Sunderland |
