Germany’s largest lender Deutsche Bank purged its leadership on Sunday, appointing Briton John Cryan as chief executive to replace Anushu Jain in the latest shakeup by a European bank following the financial crisis. Deutsche Bank has struggled to restore an image tarnished by a raft of regulatory and legal problems which include probes into alleged manipulation of benchmark interest rates, mis-selling of derivatives, tax evasion and money laundering. Cryan, 54, has been on the bank’s supervisory board since 2013 and was a former chief financial officer of UBS.