TSB, the bank that was spun out of Lloyds in 2013, has split from Havas EHS just days after the company's internal restructure.
Havas EHS won the direct marketing business 18 months ago. This week, EHS merged with Havas Discovery to bring together its data and digital businesses under one umbrella.
The new agency – called Helia – plans to rapidly expand its client base in Europe, the US and China.
However, the banking group was looking for greater support at its Bristol base and has consequently parted company.
It is not currently known if TSB will bring in a new agency to handle the account. Joint currently manages its advertising business.
The Drum was awaiting clarification at the time of writing.