Or they have absolutely no common sense at all.They'll be charged under section 13 of the Terrorism Act, so not actually classed as "terrorists" (see s.40).
But I hope it's not illegal to highlight the stupidity of all this by calling him a blind terrorist or her a frail terrorist.
It's almost as if the Police want to help make the case at the high court that proscription is suppressing peaceful protest against genocide. Either that or police overtime is a bit short at the moment.