Female Catholic President. Bit of a risk that she doesn't like people who have (admitted in court in the UK) some pretty dubious sexual acts. Acts which the UK court have said would constitute offences in the UK.
He's also been bailed by the British courts for the purposes of the extradition process. So he may be committing offences in terms of that. Concrete offences that a normal extradition treaty might cover but that the Swedish "we want to question" warrant may not outside the EU.