UK prosecutors admit destroying key emails in Julian Assange case

Email exchanges between the CPS and its Swedish counterparts over the high-profile case were deleted after the lawyer at the UK end retired in 2014. The destruction of potentially sensitive and revealing information comes ahead of a tribunal hearing in London next week.

Adding to the intrigue, it emerged the CPS lawyer involved had, unaccountably, advised the Swedes in 2010 or 2011 not to visit London to interview Assange. An interview at that time could have prevented the long-running embassy standoff.

The CPS, responding to questions from the Guardian, denied there were any legal implications of the data loss for an Assange case if it were to come to court in the future. Asked if the CPS had any idea what was destroyed, a spokesperson said: "We have no way of knowing the content of email accounts once they have been deleted." Assange, whose WikiLeaks has been involved in a series of controversial leaks that include the Iraq war logs, US state department cables and Democratic party emails, was wanted by Sweden as part of a preliminary investigation into rape allegations. Sweden dropped the investigation in May. Detractors of Assange, who sought refuge in Ecuador's embassy in 2012, accuse him of collaborating with Russian propagandists in undermining Hillary Clinton's bid for the presidency and helping Donald Trump secure it.

Supporters of Assange fear he could have been extradited to the US from Sweden and might yet from the UK. The US attorney general, Jeff Sessions, said this year Assange was a priority for the justice department and US federal prosecutors are believed to be considering charges against him over the leaks.

The CPS data destruction was disclosed in a freedom of information case being pursued by the Italian journalist Stefania Maurizi. Maurizi, a reporter on La Repubblica who has covered WikiLeaks.