The right way to do it, in my opinion, it is to contact the council, they'll put a warning sign that the bike will be removed from the rail within some time (usually a couple of weeks) unless the owner contacts them back. If no one gets back to them, they'll remove it from the rail and put it up in an auction I believe.
I think many council usually do that every couple of months.
Update: I did send them an e-mail regarding this. Let's see what happens.
The right way to do it, in my opinion, it is to contact the council, they'll put a warning sign that the bike will be removed from the rail within some time (usually a couple of weeks) unless the owner contacts them back. If no one gets back to them, they'll remove it from the rail and put it up in an auction I believe.
I think many council usually do that every couple of months.
Update: I did send them an e-mail regarding this. Let's see what happens.