Scotland Yard has received the paperwork required to arrest WikiLeaks founder Julian Assange, sources say.
A fresh European Arrest Warrant has been issued by the authorities in Sweden where he is wanted for questioning over claims of sexual assault.
Mark Stephens, who represents the 39-year-old Australian former computer hacker, said he would fight any move to extradite his client.
But the move means there is no longer any legal impediment to holding Mr Assange and making him appear before City of Westminster Magistrates' Court.
Mr Assange is believed to be in hiding in south-east England as the latest publications on his whistle-blowing website fuel global uproar.
Prosecutors in Sweden issued a warrant for his arrest last month but it could not be enforced because of a technical blunder.
The Australian's details were also added to Interpol's most wanted website after a red notice was issued, alerting police worldwide to his outlaw status.
Detectives in Sweden want to question Mr Assange after two women claimed they were sexually attacked when he visited the country in August.
The country's Supreme Court upheld a court order to detain Mr Assange for questioning after he appealed against two lower court rulings.
Mr Stephens has denounced the move in Sweden as a "political stunt" and said he would fight extradition on the grounds that Mr Assange could then be handed to
the US. He said police know where his client is and should arrange for an interview by consent instead of a "show trial".
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