Whether or not you share the EDL's view of our nation, what cannot surely be doubted is that the members consider themselves patriots, and as such - and as evidenced by all their official statements on the matter - they were not in Westminster to cause trouble but to pay their respects to the nation's war dead. Although it is no doubt the case that a poppy-burning salafist would have provoked a reaction, there is not one shred of evidence that any of the arrested were doing anything wrong.
Consulting the Great Oracle (Wikipedia), I learn:
"In England and Wales, breach of the peace is not an offence, in the sense that it is not punishable either by a fine or imprisonment either at statute or common law and nor do proceedings for breach of the peace give rise to any conviction. In England and Wales, constables (or citizens) are permitted to arrest a person to "prevent a further breach of the peace" which allows for the police or the public to arrest a person before a breach of the peace has occurred. This is permitted when it is reasonable to believe should the person remain, that they would continue with their course of conduct and that a Breach of the Peace would occur."This is very important. We were told, through the media, that the arrests took place "to prevent a breach of the peace" NOT a further breach of the peace. If words have meanings, it is clear that the only occasion that someone can be arrested to prevent a breach of the peace is if they are already committing or have already committed such a breach.
EDL have some thinking to do. My advice to them would be to pool their resources and get some proper legal advice and challenge the lawfulness of these arrests. They must be mindful of being manipulated as 'useful idiots'. They might also want to re-think who the real enemy is - the authoritarian state.
(P.S. According to that Wikipedia clip, citizens have the same power of arrest, so next time maybe EDL should arrest the cops on the same charge.)