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| BDO LLP shared | · | · | active |
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| Capita Business Services Ltd shared | · | · | active |
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| Edge public solutions Ltd shared | · | · | active |
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| Ernst & Young LLP shared | · | · | active |
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| FM Management Solutions Ltd shared | · | · | active |
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| Stantec UK Limited shared | · | · | active |
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| Walker Resource Management Ltd. shared | · | · | active |
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| Wilde Consultants Ltd shared | · | · | active |
| Wood Group UK Limited shared | · | · | active |
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| WYG Engineering Limited shared | · | · | active |