Hunton's first act as the UK boss was to oust the managing partner, Chris Macleod, the executive planning director, Julian Saunders, and the business development director, Stephen Colegrave. All three were brought in during Ingram's year-long tenure which ended earlier this month.
Hunton will report to Langdon, who will take the UK chairman role, in addition to his existing roles. He will take a more active interest in the day-to-day running of the UK agency than he did while Ingram was the chief executive.
The new roles are part of an expected restructure that sources believe will see McCann-Erickson EMEA working more closely with the UK office across all departments, including planning and creative. This is likely to mean that part of Saunders' former remit will fall to the European planning department. However, neither Colegrave nor Macleod will be replaced.
Langdon said: "It was time for the agency to pare back. January tends to be the month when difficult decisions like this are made."
Hunton joined McCann- four years ago as the deputy managing director and subsequently rose to the position of deputy chief executive. During his time at the agency he has forged close ties with the MasterCard, Greene King and Bacardi accounts.
Before joining McCann, Hunton worked on the Smirnoff and Weetabix accounts at Lowe. He has also worked for Young & Rubicam and FCB.
Langdon said: "Everybody knows what Chris is about. He is totally focused on clients, and what their businesses need, and on great work. And that's exactly what McCann London is going to be about this year, so I'm convinced that Chris is the right guy, at the right time, to take all of us and our clients to where we want to be."