Yup, arrested on 'suspicion of conspiracy to cause a nuisance - tomorrow' - basically anyone the police deems has a personality which might potentially clash with the mindset desired for the royal wedding, thy're locking them up, just in case they had had any private thoughts relating to not cooperating with wedding plans prior to the event happening.
How messed up is that, first people were being arrested for conspiracy to commit acts of terrorism because they joked that they wanted to blow up their school, and now people are being arrested on suspicion of conspiracy to be a nuisance. Hell, i could do any of 50 ghazillion things and be a nuisance, being a nuisance is not a crime, . Not even an actual conspiracy, just on the suspicion that they might be planning a conspiracy. All before anything actually happened. No such thing as innocent until proven guilty any more.