I don't know the details of the other cases but the UK didn't jail anyone for being a "curious observer". They jailed him in advance of his trial where it is al

I don't know the details of the other cases but the UK didn't jail anyone for being a "curious observer". They jailed him in advance of his trial where it is alleged he took part in criminal acts (setting fire to shops and other standard riot stuff). He claims he was a curious observer, but frankly he can claim whatever he likes. Like everyone in pre-trial detention he is innocent until proven guilty so his claim doesn't really change anything.