Peter Lawwell signals end of an era at Celtic after announcing his retirement

Celtic chief executive Peter Lawwell is to leave the club (Andrew Milligan/PA)

Peter Lawwell signalled the end of an era at Celtic with the announcement that he will retire as chief executive in the summer after 17 years in the role.

The 61-year-old will step down at the end of June after overseeing a period of success that has seen the club win 29 trophies, including 13 league titles and an unprecedented four successive domestic trebles.