An England football fan convicted for his role in a riot in Portugal during Euro 2004 is to be extradited later to serve a two-year sentence.
Former Kent firefighter Garry Mann, 52, will be flown from Heathrow to Lisbon and will then be transferred to an undisclosed prison.
Mann claims he never received a fair trial over the riot in Albufeira.
He said he had been caught up in extradition laws meant for terrorists and warned others would follow him.
"I have been let down by the politicians that agreed to the UK's rigid extradition laws and the European arrest warrant and by the judges who no longer seem willing to stand up for justice," he said.
"This was supposed to have been for terrorists implemented after the 9/11 attack but, for some reason, I have been caught in its net.
"I am not the first victim of this system and, until it's reformed, I won't be the last."
'Travesty of justice'
Mann was deported from Portugal after his conviction but not made to serve his sentence in the UK.
He has fought a six-year battle against extradition in the British and European courts.
Last week his lawyers failed in their last-ditch attempt to secure a judicial review at the High Court.
Jago Russell of Fair Trials International, the group that has campaigned on his behalf, said: "Garry Mann's trial in Portugal was a travesty of justice.
"The UK's decision to extradite him is an outrage."
Fair Trials International said Mr Mann was booked on an Air Portugal flight departing from Heathrow on Wednesday at 1620 BST.
Birmingham City supporter Mann was drinking with friends in a bar in Albufeira when a riot involving football fans began in a nearby street.
Mann was arrested, tried and convicted within 48 hours.