- WHAM MEDIA LTDType: Advertising agenciesIncorporated: 7 December 2006
- FOCUS 4 PEOPLE LIMITEDType: Market research and pollingIncorporated: 14 April 2005
- RELATIONS GROUP LTDType: PR and communicationsIncorporated: 17 December 2002
- BRENNER PRODUCTIONS LIMITEDType: Media representationIncorporated: 19 November 2002
- MICHAEL K HOWARD (THAMES VALLEY) LIMITEDType: Advertising agenciesIncorporated: 1 June 2001
- MICHAEL K HOWARD (SOUTHERN) LIMITEDType: Advertising agenciesIncorporated: 22 February 2001
- TURISMOTEC LTDType: Advertising agenciesIncorporated: 28 December 2000
- MICHAEL K HOWARD (MILTON KEYNES) LIMITEDType: Advertising agenciesIncorporated: 21 March 2000
- MKH ADVERTISING LIMITEDType: Advertising agenciesIncorporated: 21 March 2000
- ACCORD SEARCH LIMITEDType: Advertising agenciesIncorporated: 15 February 2000
- TRAVELADS LIMITEDType: Advertising agenciesIncorporated: 15 February 2000
- CONRAD ADVERTISING LIMITEDType: Advertising agenciesIncorporated: 12 January 2000
- ACCORD HOLDINGS LIMITEDType: Advertising agenciesIncorporated: 14 December 1999
- TRAVELCLASSIFIED LIMITEDType: Advertising agenciesIncorporated: 14 December 1999
- TRAVELCLASSIFIED.CO.UK LIMITEDType: Advertising agenciesIncorporated: 14 December 1999
- TRAVELCLASSIFIED.COM LIMITEDType: Advertising agenciesIncorporated: 14 December 1999
- UNISON MEDIA LIMITEDType: Advertising agenciesIncorporated: 27 October 1999
- SENIOR KING PRINT & DESIGN LIMITEDType: Advertising agenciesIncorporated: 8 June 1999
- CABVISION LIMITEDType: Media representationIncorporated: 1 February 1999
- SENIOR KING INTERACTIVE LIMITEDType: Advertising agenciesIncorporated: 26 October 1998
- BOYNE PUBLICITY LIMITEDType: Advertising agenciesIncorporated: 20 February 1997
- MICHAEL K HOWARD (NORTHAMPTON) LIMITEDType: Advertising agenciesIncorporated: 29 August 1996
- FORTHLEASE LIMITEDType: Advertising agenciesIncorporated: 12 April 1996
- CONRAD ADVERTISING (NORTH) LIMITEDType: Advertising agenciesIncorporated: 29 March 1996
- IAN WYNESS ADVERTISING LIMITEDType: Advertising agenciesIncorporated: 10 January 1995
- INTRINSIC MEDIA GROUP LIMITEDType: Advertising agenciesIncorporated: 3 July 1992
- SENIOR KING SOLUTIONS LIMITEDType: Advertising agenciesIncorporated: 19 November 1991
- NETIZEN LIMITEDType: Advertising agenciesIncorporated: 12 October 1989
- STEED ADVERTISING LIMITEDType: Advertising agenciesIncorporated: 25 April 1989
- ARTAVIA ADVERTISING LIMITEDType: Advertising agenciesIncorporated: 20 November 1987
- MEDIA OPTIONS LIMITEDType: Advertising agenciesIncorporated: 22 July 1982
- SENIOR KING COMMUNICATIONS GROUP LIMITEDType: Advertising agenciesIncorporated: 16 June 1982
- GREGORY MACKENZIE & CO. LIMITEDType: Advertising agenciesIncorporated: 11 September 1979
- SENIOR KING LIMITEDType: Advertising agenciesIncorporated: 30 March 1977
- NETIZEN DIGITAL LIMITEDType: Advertising agenciesIncorporated: 13 October 1969
- G&P ADVERTISING LIMITEDType: Advertising agenciesIncorporated: 24 January 1906