They will not allow the wife of a security official to be in a foreign prison.
Well she has torpedoed his career for good. It will be interesting when the clash in court over extradition comes, whether we get to see the terms of the "treaty" under which the US claim she is protected. Mainly because it is going to further squeeze the UK (and our rather too-smug-for-school Home Secretary) into an even tighter corner.
It's entirely possible - if not probable - that at some point in the future you will have someone from the Foreign Office having to appear in a US court requesting the details of he treaty are not made public. Meaning they will have to sit opposite the CPS lawyers who will be arguing for extradition.
My personal concerns would be (especially since we recently learned that the law doesn't apply to the UK security forces) that we have US agents (with a less than perfect track record) running around on UK soil with a licence to kill UK citizens at will. After all, if we can't try one for an accidental killing, we'll never be able to try them for a targeted one.