[Twosugars]

I can see the argument that she was British so should be dealt with by Britain, but
there's also something to be said for a state being able to divest itself of its citizens who go and fight against it. It would be part of the deterrent: the rest of their life spent stateless. We could also add an incentive that if significant change of ways (words and actions) shown in future their citizenship may be reviewed again.