[syhprum (OP)]

Daily Mail readers et al are crying out for vengeance wanting to have an American woman Mrs Anne Sacoolas to be brought to face causing death by careless driving charges after fleeing the country claiming  diplomatic immunity, it is probable that if convicted  she would face a non custodial sentence .
At the same time the Americans want Assange back to face charges of leaking classified information which would probably entail life long imprisonment in a hell hole jail until he died of cancer (a common end to American troublemakers).
This is the sort of deal we do with our most important ally.

[alancalverd]

A swap creates a dangerous precedent that can lead to kidnapping and false accusation of hostages in exchange for political refugees. Each case must be treated separately.

What the UK courts have to consider in an extradition case is whether the subject has probably broken the law overseas (almost certainly in Assange's case) and whether he will receive a fair trial and reasonable punishment (probably not). There are adequate precedents and standards from Official Secrets trials.

Mrs Sacoolas raises the question of whether diplomatic immunity is supposed to apply where there is clear evidence of the death of a host citizen. The original intention of this international agreement was to prevent the harassment of ambassadors and their immediate staff with charges of minor infringement. Had Mrs S remained in the UK or returned to face prosecution she would, along with a dozen others (including occasional US military personnel) on any day in a county court, almost certainly have received a fine and endorsement for careless driving since there is no suggestion of drunkenness or intent to cause harm. If she really was a covert friendly, the US embassy would have offered an apology and compensation. But, having fled justice and received the express support of a corrupt president, she will likely face a lynch mob if she returns, and  the US courts may consider this excessive risk.

The War of Jenkins Ear tells us what happens next.