Former boxing champion, Eubank arrested for protesting harry going to iraq

here is a video of english former world champion boxer, being arrested for just driving his truck in london, protesting harry going to iraq. He has a massive message on his truck, and this seems to have got him arrested.

Eubank being arrested

Here is the page, with the news.
here

It seems like he was arrested for just driving his truck and with the message.

What do you guys think of this, and how bizarre

why is it odd, Protest are not allowed in the police state.