The Communication Group is understood to be facing a mass senior director level walkout this week as three of its six-strong board resign.
Group MD Peter Hamilton refused to confirm speculation that consumer division chairman Julie McGarvey, Scotland MD Cameron Grant and financial practice chief Henry Faure Walker were all poised to leave the agency.
PR Week understands that McGarvey and Grant are set to launch their own consumer PR agency in the near future. Due to contractual obligations neither would comment but it is understood they both tendered their resignations to Hamilton last week.
Grant has spent just over a year as TCG's Scottish MD. He has been with the agency for three years having joined from food and drink specialist Mulcaster Public Relations.
Meanwhile financial division MD Faure Walker is leaving the agency to study for an MBA at INSEAD in Paris. He will start in the new year at the high-profile French business school, which counts Conservative leader William Hague among its alumni.
Divisional director Sam Vallings has stepped into the financial MD role. He joined TCG four years ago from Grandfield. It is not yet clear whether Vallings will take Faure Walker's seat on the main board. His divisional director post has been filled by the promotion of account handler Tom Allison.
The financial practice works for clients including stadium group Wembley, hotel chain Heron International and retail entrepreneur Philip Green.
The Communication Group ranked 34 in PR Week's Top 150 with fee income of pounds 3,761,000.