1. The US has requested that he be extradited

2. The UK is currently holding him (and has been for 2 years) while Assange appeals the extradition request

So he's by every legal and semantic definition in the UK prison by choice.  He can allow himself to be extradited to the US at any time.

Now, it's true that he would prefer not to be in any prison.  But it feels like the US has a reasonable case against him that should be evaluated by a court (and the UK agrees).  Unless you feel there is literally no law that he could reasonably be said to have broken -- such as aiding and abetting a fugitive by helping Snowden hide his tracks while escaping, or collaborating with a convicted felon (Chelsea Manning) in publishing state secrets?  I'm sure you would think that he has a reasonable defense against those, and if so, he should do great in court.  But do you believe the court has truly no reasonable case to even hear?

-david