Thompson is reportedly seeking legal advice following his dismissal and his lawyer, Margaret Gibbon, of Glasgow-based Bridge Litigation, said in a statement: “I can confirm that I have been instructed to act on behalf of Alan Thompson following his dismissal by Celtic FC.
“Alan was informed of the decision to terminate his employment with immediate effect in a telephone conversation with the club manager Neil Lennon.”
Thompson joined Celtic in June 2010, as first team coach alongside manager Neil Lennon and assistant manager Johann Mjallby following the sacking of Tony Mowbray.
Thompson was part of Celtic’s European adventure which saw them reach the UEFA Cup Final in 2003, before being beaten in extra time by Jose Mourinho’s Porto.
The Englishman won four Scottish Premier League titles, three Scottish Cups and two League Cups as a player with Celtic in the seven years he spent at Parkhead. On his return to Celtic as a coach, he was part of the management team which guided Celtic to Scottish Cup victory last season against Motherwell and secured the Scottish Premier League title this season.
In a statement released on Monday afternoon, Celtic confirmed that Thompson had left the club. The statement added: “We can also confirm that a meeting was set up between Alan Thompson and Neil Lennon on Sunday (June 3) in Newcastle. However, Alan refused to meet with Neil, hence the reason for the discussion being conducted by telephone. The matter is now in the hands of lawyers and, therefore, we are unable to go into any further details.”