The judgment will be announced at 9.15am. Lord Phillips of Worth Matravers, the president of the supreme court, will give a summary of the point of law raised by the case, the court's decision, and a brief explanation of why it has reached that decision.
Today's ruling does not deal with the substance of the accusations--which relate to a trip Assange took to Sweden in 2010, after which he was accused by two women with whom he had had sex of four offences of unlawful coercion and sexual misconduct including rape.
Instead it relates to one specific question: can a prosecutor rather than a judge legally order someone's extradition?
In Britain generally only judges can approve arrest warrants. But the warrant for Assange was issued by Sweden's public prosecutor, as is normal there.
Assange's lawyers argue that the Swedish system is unfair because it puts the power to issue arrest warrants in the hands of the same prosecutors who are trying to put the accused person in jail. [Read complete article at the Guardian UK]