So there's this guy here in the U.S. who is being held "indefinitely". He was initially arrested in 2002 for over-staying his visa (the dumb-ass) but was eventually charged and convicted of sending money to overseas terrorist organizations. He has now served the lame sentence he received, but he is not a U.S. citizen, and no other country will take him in. So the administration doesn't want to just release him into the U.S. (Thank you, Attorney General Barr.) I don't know whether your Mr. Corbyn has been asked to take him in, but he sounds like another perfect candidate for rehabilitation in London.
This Reason magazine article's annoying author bemoans this "bureaucratic cruelty" and the fact that the government hasn't identified any "identifiable victims" to his actions, as rationales for letting the guy go free here in the U.S. Boo hoo. He should rot in hell, but rotting in prison is the next best thing.