The UK refused to allow Assange to be extradited to the US because the US still practices the death penalty. That's one of the few areas that the UK and the US disagree publicly on.
Instead he was merely kept isolated in a single building while his accusers simply refused to investigate the allegations they invented unless he turned himself over to them to be extradited to the USA.
So yeah, maybe they aks how high, but sometimes don't jump all the way, just most of it.