Next non-executive chairman John Barton is to retire in August and will be succeeded by Michael Roney.
Barton became a member of the board in 2002. He was appointed deputy chairman in 2004 and chairman in 2006.
“John has made an outstanding contribution to the company over the last 15 years and his leadership, experience and wise counsel have been tremendously valuable over that time,” said the company in a statement. “John leaves with the profound thanks of his colleagues.”
Roney was chief executive of FTSE 100-listed distribution and outsourcing business Bunzl from 2005 until his retirement in April 2016. He is currently chairman of builders merchants business Grafton Group and a non-executive director of wine and spirits group Brown-Forman Corporation.