| Mayer Brown Ltd. | Consulting Engineers | Consulting Engineers | Unit 7, Killingbeck Drive Leeds West Yorkshire LS14 6UF, Leeds, Leeds |
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| W S Atkins Plc | Consulting Engineers | Consulting Engineers | Woodcote Gro, Ashley Road Epsom Surrey KT18 5BW, Epsom, Epsom |
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| Vectayn Ltd. | Consulting Engineers | Consulting Engineers | 4 Atlantic Square, Station Road Witham Essex CM8 2TL, Witham, Witham |
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| Tottenham & Bennett | Consulting Engineers | Consulting Engineers | Unit G1 Trowbray House London SE1 3QB, London |
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| Ward Cole Ltd. | Consulting Engineers | Consulting Engineers | Fosse House, Roman Wharf Lincoln Lincolnshire LN1 1SR, Lincoln, Lincoln |
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| Redapt Engineering Co. Ltd. | Consulting Engineers | Consulting Engineers | Unit 46/47, Darlaston Central Trading Estate Wednesbury West Mid, Wednesbury, Wednesbury |
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| Hulley & Kirkwood | Consulting Engineers | Consulting Engineers | Horizon House, 28 Upper High Street, Epsom, Surrey, KT17 4RS, Epsom, Epsom |
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| Frazer Nash Consultancy Ltd | Consulting Engineers | Consulting Engineers | 1 Trinity Street, College Green, Bristol, Avon, BS1 5TE, Bristol, Bristol |
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| Davies Aspin Partnership | Consulting Engineers | Consulting Engineers | Kings Weston House, Kings Weston Lane, Bristol, Avon, BS11 0UR, Bristol, Bristol |
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| Airey & Coles | Consulting Engineers | Consulting Engineers | 9 Craigie Drive Plymouth Devon PL1 3JB, Plymouth, Plymouth |
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