Table complied using figures provided by Wilott Kingston Smith.
The full table of the top 50 advertising agencies was published in Campaign magazine in November 2007.
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| Rank | Agency | Year End | Latest (£000s) |
| 1 | Young & Rubicam Group | 31/12/2005 | 101,605 |
| 2 | M&C Saatchi | 31/12/2006 | 75,877 |
| 3 | The Ogilvy Group (Holdings) | 31/12/2005 | 68,859 |
| 4 | Bartle Bogle Hegarty | 31/12/2006 | 56,990 |
| 5 | JWT Group | 31/12/2006 | 49,562 |
| 6 | McCann Erickson Advertising | 31/12/2005 | 46,961 |
| 7 | Saatchi & Saatchi Group | 31/12/2005 | 42,790 |
| 8 | Abbot Mead Vickers | 31/12/2006 | 42,673 |
| 9 | DDB UK (formerly BMP DDB) | 31/12/2006 | 42,309 |
| 10 | Publicis | 31/12/2005 | 31,989 |