Assange v Swedish Prosecution Authority British to review the case, the Working Group on Arbitrary Detention formally declined to do so in late November, saying that there was not enough new information provided to warrant such a review. Assange and his supporters have expressed concerns that upon his return to Sweden, Assange may be extradited to the United States to face charges related to his professional work, since Wikileaks has been under investigation in the US since at least 2010. On 13 January 2017, Wikileaks announced that Assange would agree to extradition to the United States if the Obama administration granted clemency to Chelsea Manning
UK–US extradition treaty of 2003 end of December 2011, 33 known UK citizens (including 6 with dual nationality) were extradited from the UK to the US. The U.S. embassy in London reports that, as of April 2013, 77 individuals have been extradited from the UK to the US. The U.S. has argued that this is not disproportionate, due to the US population being about five times larger than the UK population. UK–US extradition treaty of 2003 Controversy surrounds the UK–US extradition treaty of 2003, which was implemented by the UK in the Extradition Act 2003 and came into force in April 2007 following its ratification