Re: Obligation to arrest.
My question is who would think it unreasonable for Sweden, in that hypothetical situation, to claim they had tried everything they were obliged to try. Therefore the answer that the case officer would think "what an arrogant little twat" is not really an answer to the question I posed, however accurate it may be as a statement.
I think even if the fugitive were a convicted war criminal, many countries would, when that fugitive entered a foreign embassy and was given refuge, be happy to tell the country that issued the EAW that there was nothing further they could do, and that the issuing country should now take it up with the country to whom the embassy belongs.
Not only would that free up our police and save us money, but it would deprive Assange of the 'oxygen of publicity' as it is unlikely our parochial media would give much of a toss regarding a dispute between Ecuador and Sweden. I can't see that our (UK) reputation would be damaged much by saying this is no longer our problem.