Britain's High Court on Monday gave Julian Assange, founder of the whistle-blowing website WikiLeaks, permission to appeal against his extradition from the UK to Sweden.

Swedish authorities want to question the 40-year-old Australian over accusations of rape and sexual assault made by two female former WikiLeaks volunteers during a visit there in August 2010.

Assange, who has been living in Britain since his arrest here in December last year, denies wrongdoing. He can now take his year-long legal fight to Britain's Supreme Court, the highest court in the land.

(Stephen Addison)