A drink-driver who fled Taiwan after being convicted of killing a man in a crash has won a human rights challenge to avoid being extradited.

Zain Dean, 45, was given a four-year sentence from judges on the Asian island for killing a newspaper seller in a hit-and-run in 2010.

The businessman disguised himself from Taiwanese immigration officials by lightening his skin with make-up and using the passport of a white friend to abscond to the UK in August 2012.

He moved to Edinburgh and changed his name from Zain Dean to Callum Rafael Scott.

Dean was arrested at his home on Frederick Street in October 2013 after British police teamed up with the Taiwanese authorities.

In the first case of its kind in Taiwan's history, officials launched a bid to extradite Dean.

The authorities agreed to give Dean special treatment at the jail - including providing a larger cell and better quality of food - in a bid to allay concerns about inhumane conditions.

The case was originally heard at Edinburgh Sheriff Court, where Sheriff Kenneth Maciver ruled that Dean - who has been held at HMP Edinburgh since 2013 - should be extradited to Taiwan.

Dean launched a legal appeal against his extradition, claiming that sending him back to Taiwan would contravene article three of the European Convention on Human Rights.

The clause prohibits the torture and "inhuman or degrading treatment or punishment" of individuals.

His lawyers said prison conditions in Taiwan were poor and Dean was at threat of being attacked by prisoners who would be jealous of his special privileges.

At the Court of Criminal Appeal in Edinburgh on Friday, judges Lady Paton and Lady Clark of Calton ruled Dean should not be sent back to Taiwan because prison conditions there violate article three.

They overruled the third judge on the panel, Lord Drummond Young, who said Dean should be returned to Asia, and quashed the order for Dean's extradition.

In a written judgment, Lady Paton said: "I infer that being so favoured by the authorities would cause significant animosity amongst other prisoners.

"That would be highly disadvantageous for the appellant who is already notorious and unpopular because of his personal circumstances and the offences of which he has been found guilty of."

She said she would be an "easy target" even when supervised by a guard.

The appeal judges told Dean, who faces a further extradition request over absconding from Taiwan, that they would be prepared to grant him bail.

He was told he would have to surrender a passport he holds in the name of Callum Rafael Scott and would have to report weekly to a police station.

Prosecutors now want to appeal the decision of the appeal court at the UK Supreme Court in London.