In general that should be true.
But Saroa is or was a paid up member of the CME.
So he definitely has legal obligations to the US.
Hiss ass (which he once told the CME to kiss) belongs to Uncle Sam now.
My remark was triggered by the fact that there is no investigation of the charges in the country that receives the extradition request at present. He's still a UK citizen, the fact that he was once a member of the CME does't change his British civil rights. I have no doubt he wil be extradited, though i don't agree with the present practice.