Dunn joined the club last summer as a player after he left Blackburn Rovers by then manager Darren Kelly. 

By September however, Kelly was sacked after a poor start to the season, with Dunn being placed in temporary charge of the first team.

He managed to do well enough in the next few games to be given the job on a permanent basis, but have only picked up two points from their last seven games, and are currently second bottom, five points from safety.

Speaking to the club's official website, Chairman Simon Corney said: “I would like to place on record my thanks and gratitude to David for his tireless efforts over the past four months under what have been extremely difficult circumstances and wish him all the best for the future. He retained his dignity at all times and his hard work and dedication has been commendable.”

Assistant Manager Dean Holden has also left the club. Corney said “Dean has been a loyal and dedicated servant to the club and he leaves with our gratitude and best wishes.”

The club also confirmed that First Team Coach, Keith Brown, has also left his role. No comment was made on who will be placed in charge for Saturday's League One clash at Bradford.