Holy crap! Clearly no justification for a terrorism charge in the UK and yet they hold him for 9 hours. That's what we can expect in the UK or the US - except in the US they can hold you forever, KGB style.
And the US had nothing to do with it? Really? The British police weren't trying to help their American comrades? I'll never believe that it wasn't at the request of the US. Even if it was not, it's just plain sad that these things happen in what we used to know as free countries.