Regardless of what the FLA PR may say they are another group of far right, anti Islam yobs. No surprise their recent march in London was attended by EDL members.
I didn't see the flag in question but I'd like to think club officials did and that they will do something about it. There is a group of Colchester United supporters whose boorish behaviour is becoming increasingly evident, particularly away from home. It wouldn't be a big surprise if they are the same people waving the FLA flag.