Britain's Bank of London and The Middle East (BLME) said on Sunday its chief executive Humphrey Percy would step down effective June 11. Percy, who has served as CEO since August 2006, will also step down as a board member of the bank, BLME said in a statement. No reason for his departure was given in the statement, which quoted him as looking forward to the new challenges. An announcement on his successor as chief executive of BLME will be made in due course, the statement added.