IMO the denial of Sweden to guarantee Assange that he will not be sent to the US is enough to

[struggle4progress]

122. "... There was at one stage a suggestion that Mr Assange could be extradited to the USA (possibly to

Guantanamo Bay or to execution as a traitor). The only live evidence on the point came from the defence witness Mr Alhem who said it couldn’t happen. In the absence of any evidence that Mr Assange risks torture or execution Mr Robertson was right not to pursue this point in closing ... If Mr Assange is surrendered to Sweden and a request is made to Sweden for his extradition to the United States of America, then article 28 of the framework decision applies. In such an event the consent of the Secretary of State in this country will be required, in accordance with section 58 of the Extradition Act 2003, before Sweden can order Mr Assange’s extradition to a third State. The Secretary of State is required to give notice to Mr Assange unless it is impracticable to do so. Mr Assange would have the protection of the courts in Sweden and, as the Secretary of State’s decision can be reviewed, he would have the protection of the English courts also. But none of this was argued ..."
City of Westminster Magistrates’ Court (Sitting at Belmarsh Magistrates’ Court)
The judicial authority in Sweden -v- Julian Paul Assange
Findings of facts and reasons

Mr Assange had opportunity to bring such matters to the UK courts for review. The courts have ruled against him. Res judicata