[1] Having been in charge at The Northolme for three years, following a 3–1 home defeat to Whitby Town on 9 October 1993 Simpson resigned from his role with Leighton James succeeding him in Trinity's hotseat.
[2] He became something of a cult-figure with the club, helping them secure the Northern Counties East League Division One Title for 1993–1994[3] before joining Hyde United in September 1994.
[5] He won nine England semi-professional international caps and also captained the Middlesex Wanderers touring side, playing games in Indonesia, Holland and Hungary.
Between November 2003 and March 2004, he was caretaker manager with the club for 11 Football League games in the absence of Keith Alexander, winning five, drawing four and losing just two.
[8] A board meeting three days later saw Alexander return to the manager's seat but Simpson leave the club by mutual consent for footballing reasons.
However, he was asked to stand down by chairman Mike Rance on 18 March 2012 following a run of 16 consecutive games without victory, with the club finding themselves out of the relegation places in League Two only by way of goal difference.