Clubs exchanging information on violent fans?

[Jesper Tone]

I'm a football fan from Denmark, and have some questions concerning
football violence and the measures clubs can take to stop it in
England.

Recent years Denmark has experienced an increase in football related
violence in the League. As it is now it is only in cooperation with
the police, that the clubs can register and survey ordience; Danish
law makes it impossible for the football clubs to register and
exchange material on certain persons that might cause trouble - this
can only be done in cooperation with the police.

How is the case in England? Can the clubs exchange information on
violent spectators with eachother without involving the police?
I would be interested in any kind of material, links or other that can
light this matter.

Kind regards
Jesper