Sherborne boss Edward Bramson renewed his criticism of the lender's investment banking-led strategy, in addition to criticising the CEO's conduct, in a letter to Sherborne investors seen by Reuters.

Staley has said he regrets having a professional relationship with Epstein, who killed himself last August while awaiting trial on sex trafficking charges.

Barclays declined to comment.

(Reporting By Sinead Cruise and Lawrence White; editing by David Evans)