It was named European Consultancy of the Year, while Richard Bullard and Martin Sawyer were respectively badged European and UK Consultant of the Year.
AS Biss & Co saw off keen competition from shortlisted entrants Upstream and Connect PA to take the Best UK Consultancy gong.
Cancer Research UK triumphed as both Campaigning Charity and UK In-House Team of the Year, while The BioIndustry Association was named Best European In-House Team.
EDS director of marcoms Malcolm George was Best UK In-house Professional.
The Hansard Society scooped the Best Think-Tank award; David Cameron was named Politician of the Year.
Morgan Allen Moore consultant Alex Mawer was UK Newcomer of the Year, while The Observer's Andrew Rawnsley was Political Journalist of the Year.