Roger Jenkins, a high-profile executive for Barclays who played a central role in raising billions to shore up the UK bank last year, is leaving to launch his own advisory firm, people familiar with the matter said.

Jenkins, executive chairman of investment banking and investment management for Barclays in the Middle East, started talks about a year ago to leave the bank so he could spend more time with his wife and young children, who live in Southern California, the people said.