An Albanian suspected of being the leader of a gang that trafficked people says he should not be deported because he does not like Belgian prisons.
Adriatik Hysenlika is facing extradition from the UK to serve a ten-year prison sentence.
But he claims deportation would deny him access to his two-year-old son, who was born in Britain.
His lawyers also say this would violate his human rights as prisons in Belgium are overcrowded.
Hysenlika, 43, arrived in Britain in 1998, claiming to be persecuted in Albania.
He was granted a United Kingdom passport in 2007.
Hysenlika, from Willesden, North West London, was arrested by the National Crime Agency last August following a request from Belgian authorities, where he had been convicted in absentia of 60 immigration offences.
Court documents obtained by The Sun say he was the "leader of a criminal organisation".
His gang is said to have been involved in smuggling immigrants from Albania and Greece through Belgium, France and the Netherlands to the UK.
Hysenlika is in Wandsworth Prison in London and a request has been made to strip him of his British citizenship.