Paul Grayson has ended his 19-year association with Northampton Saints with immediate effect.
The former England fly-half joined the club in 1993, going on to become the Northampton's all-time leading point scorer with 2,784 from 259 games.
Grayson's distinguished playing career saw him win the Heineken Cup, while he toured with the British and Irish Lions in 1997 and was part of England's World Cup-winning squad six years later.
Grayson went on to join the back-room staff at the Saints, working his way up to head coach before the arrival of Jim Mallinder as director of rugby.
Grayson, who leaves the club by mutual consent, said: "I have put heart and soul into the club over many years, as have my wife and children.
"I enjoyed myself as a player here, and over the past few years it has been satisfying to have played a part in helping the Saints get back to the top of the club game. I am proud to have been a part of the history of one of the great clubs.
"I'd like to thank the Barwell family for everything they have done for me and my family over the years, as well as the Saints fans for all their support.
"After 19 years at Franklin's Gardens I need to prioritise my wife and children and make some sacrifices for them. As such I am happy to step away from my role with the club in good health and on the right path, and look forward to exploring the many opportunities that are out there in the world of rugby.
"I look forward to watching the Saints progress and wish Jim, Dorian, the players and staff every success."