Micky Adams has resigned as manager of Sky Bet League 1 strugglers Port Vale.
Adams, who has been in charge at Vale Park since 2011, decided to step down after extensive talks with chairman Norman Smurthwaite.
The decision ends Adams' second spell at the helm after he left in 2010 to become manager of Sheffield United.
During his second period he led Vale to promotion to League One in 2013, but the club currently lie in 23rd place in the third tier.
He told the club's official website: “It is with great sadness that I have decided to leave Port Vale but I believe I am leaving the club in a stronger position than when I joined.
"I have spent five years in Burslem, punctuated by a spell at Sheffield United, and although the role of a football manager brings with it a roller-coaster of emotions, I will never forget my time at Vale and the many happy memories I will take away with me.”
Chairman Smurthwaite added: “During his time at the club, Micky helped Port Vale to deliver a positive period in the club’s history, including promotion to League One, against a backdrop of instability.
“Throughout the time I have known him, he has led the club with great passion and professionalism and it’s with a heavy heart I accept his resignation today.
“On behalf of everyone at Port Vale, I would like to thank him for his contribution and I wish him nothing but good fortune for the future.”