Legal Case Summary
Assange (Appellant) v The Swedish Prosecution Authority (Respondent) – [2012] UKSC 22
Short case name: Assange v Swedish Prosecution Authority
See also: USA v Assange
Facts
Julian Assange, founder of WikiLeaks, was accused of sexual offences in Sweden in August 2010. From 2012, he sought refuge in the Ecuadorian Embassy in London to avoid extradition to Sweden. In 2014, Assange filed a complaint to the UN Working Group on Arbitrary Detention, which ruled in his favor in February 2016, stating his stay in the Embassy was a “deprivation of liberty”. Assange maintained that he would be extradited from Sweden to the USA and prosecuted for his WikiLeaks activities if he were to be extradited to Sweden (United Nations Human Rights Council, 2016).
Issue
The key issue in this case was whether the arrest warrant issued by Sweden and the extradition request were valid. Assange argued his extradition would result in “deprivation of liberty”, exposing him to “inhumane and degrading treatment” contravening Article 3 of the European Convention on Human Rights (ECHR) (Assange v Swedish Prosecution Authority, 2012).
Holding and Rule
The Warrant issued by Sweden’s Prosecution Authority was upheld by the UK courts, which decided that the allegations Assange faced constituted extraditable offences. Regarding the ECHR Article 3 claim, the court upheld that Assange failed to show a real risk of such treatment in Sweden. The UN’s ruling on “deprivation of liberty” was non-binding and did not influence the decision of the UK courts. UK courts concluded that any “deprivation of liberty” Assange experienced was self-imposed (Bail Act 1976).
Disposition
The UK courts upheld the validity of the arrest warrant while dismissing Assange’s human rights and “deprivation of liberty” claims. Assange remained in the Ecuadorian Embassy until April 2019 when Ecuador withdrew its asylum. He was subsequently arrested by UK authorities and is currently imprisoned in the UK pending extradition proceedings to the USA (BBC News, 2019).
References
United Nations Human Rights Council (2016). ‘Opinions adopted by the Working Group on Arbitrary Detention at its seventy-fourth session’, A/HRC/WGAD/2015, PP. 52-60.
Assange v Swedish Prosecution Authority (2012) EWHC 308 (Admin). – Bail Act 1976 (UK).
BBC News (2019). Julian Assange: Wikileaks co-founder arrested in London.
Updated 21 March 2026
This article summarises the 2012 Supreme Court decision (Assange v Swedish Prosecution Authority [2012] UKSC 22) accurately in its core legal holdings. However, the article is now materially outdated in its account of subsequent events, and readers should be aware of significant developments since publication.
The article states that Assange was “currently imprisoned in the UK pending extradition proceedings to the USA.” This is no longer accurate. Following lengthy extradition litigation in the English courts — including proceedings before the Westminster Magistrates’ Court, the High Court, and the Supreme Court — Assange reached a plea agreement with the United States Department of Justice in June 2024, pleading guilty to a single count of conspiring to obtain and disclose national defence information under the US Espionage Act. He was sentenced to time already served in Belmarsh Prison and returned to Australia in June 2024 as a free man. The US extradition proceedings are therefore concluded.
The Swedish extradition warrant, which was the subject of the 2012 Supreme Court decision summarised here, had already been dropped by Swedish prosecutors in November 2019, before the US extradition proceedings ran their full course.
The core legal principles discussed in the article — concerning the validity of European Arrest Warrants issued by prosecutorial authorities, and the application of Article 3 ECHR in extradition cases — remain good law and the 2012 Supreme Court judgment retains its authority as precedent on those points.
