The whole US system considers it OK to use solitary confinement. But solitary confinement is a breech of basic human rights. So every US system is in breech until solitary confinement stops.
The existence of an extradition treaty doesn't mean that UK courts are compelled to extradite anyone until/unless US prisons cease breeching basic human rights.
The existence of an extradition treaty doesn't mean that UK courts are compelled to extradite anyone until/unless US prisons cease breeching basic human rights.