Shields, 22, was convicted after a disturbance following Liverpool FC's European Cup victory in Turkey in 2005.

He was later transferred to a prison in the UK.

His pardon follows a campaign by his family, MPs, clergymen, Liverpool FC players and many others, who believe he is innocent.

His lawyer said he would be freed today.

Shields' solicitor John Wheate said the jailed fan was "absolutely ecstatic" when he was given the news earlier today.

His parents had been told of the decision in a telephone call with Mr Straw this morning.

Mr Wheate said: "I don't know if Michael has been released yet but I can confirm he has been pardoned and will be released today.

"His parents spoke to Jack Straw earlier this morning and I have spoken to Michael myself.

"At first he couldn't believe it after all these years and knock backs.

"But now he is absolutely ecstatic and so are his family."

Justice Secretary Mr Straw announced his provisional decision not to grant a pardon on July 2.

But at a meeting with Shields' parents on August 28, new evidence emerged which convinced him of Shields's innocence, he said in a statement.

Following that meeting he has recommended to the Queen that Shields be pardoned.

Shields will walk free from prison today, he confirmed.

Louise Ellman, Labour MP for Liverpool Riverside, who has been campaigning for her constituent Shields's release ever since his conviction, said today: "I am overjoyed at Jack Straw's decision.

"Michael has suffered a gross miscarriage of justice, incarcerated for four years for a crime he did not commit and for which another man has confessed.

"I pay tribute to Michael's family and the people of Liverpool for their remarkable courage and persistence."

Mrs Ellman added: "Jack Straw has brought justice to an innocent young man. This is a day for celebration."