Taylor Herring scooped six awards – in automotive, consumer (low and high budget), CSR, technology and campaign of the year, for Spin Cycle. The agency's success comes on the back of last month's PRWeek Awards, where it went home with six gongs.
Hope&Glory took the coveted large consultancy of the year, as well as awards in media relations and digital and new media.
The Romans and Pegasus also picked up two awards each, while Talker Tailor Trouble Maker won the small consultancy award and Fourtold picked up the medium-sized agency category.
FleishmanHillardFishburn leaders Jim Donaldson and Ali Gee won consultancy heads of the year, while Barry Leggetter was a popular winner of the Mark Mellor Outstanding Contribution Award.
PRCA director general Francis Ingham describer 2018 as a "truly defining year".
"We are deepening our presence in the UK, broadening it internationally and ourselves reflecting the bending of disciplines that is taking place all around us," he said.
Ingham said the PRCA will continue to challenge issues around evaluation, talent, diversity and ethical professionalism.
"There is a need in our industry for collaboration and consolidation of membership bodies. There are quite simply too many small tents and there needs to be one big tent," he added.
"The PRCA can, must and will grow bigger in our industry. We intend to unite our industry around one membership body and that just so happens to be the PRCA, which we will work relentlessly to do over the coming years."