| All Response Media |
| AMS Media Group Ltd |
| Arena Media |
| Bartle Bogle Hegarty Ltd |
| Bray Leino Ltd |
| Brilliant Independent Media Specialists Ltd |
| Carat |
| Experience Communications |
| Feather Brooksbank |
| Initiative |
| John Ayling & Associates |
| Kinetic |
| Leo Burnett Ltd |
| M4C |
| Manning Gottlieb OMD |
| Maxus |
| McCann Erickson Advertising Ltd |
| McCann Erickson Communications House (Manchester) |
| Media Planning Group |
| MediaCom |
| MediaCom North Ltd |
| Mediaedge:cia |
| Mediaedge:cia Manchester |
| MediaVest (Manchester) Ltd |
| Mike Colling & Co Ltd |
| MindShare Media UK Ltd |
| Naked Communications Ltd |
| Nexus/H |
| OMD UK |
| PHD Media Ltd |
| PHD North |
| Posterscope Ltd |
| Publicis Ltd |
| Pure Media |
| RAPP |
| Starcom |
| the7stars |
| Total Media Ltd |
| UM |
| Vizeum |
| Walker Media |
| ZenithOptimedia UK Limited |