There were 37 arrests yesterday, none for any offence all preventative.
Theres the reason why they and the edl cover their faces, they are photographed, identified and then targeted, irrespective of any offence committed.
You may not like them, the edl or their ilk you may not see why they protest, you may resent why they protest but we live in a democracy and it is everyones democartic right to protest.
If they break the law, arrest and throw the book at them, however, when you are arrested to "prevent" you stand on the edge of a police state,