GBT agreed a fee valuing Hogg Robinson at around £400m back in February, the deal subject to clearance by the Competition and Markets Authority.

Radcliffe joined Hogg Robinson in 1978 and was appointed to its board in 1989. He became chief executive in 1997 and oversaw its transformation into a fully-fledged corporate services group.

Greg O’Hara, chairman of the GBT board, said: “I will be delighted to welcome David to the GBT board following the completion of GBT’s acquisition of HRG.

“He brings a wealth of industry experience and expertise and will play an important role as we integrate HRG, delivering continuity and helping provide value for all stakeholders and shareholders.”

Radcliffe added: “I’m excited to be given the opportunity to join the board of the combined group following the completion of GBT’s acquisition of HRG and to work with the best talent and technology from both organisations.

“The transaction will create a truly world-class company capable of delivering significant benefits to clients, colleagues and suppliers.”