Prison and Bedroom Tax - From Anonymous

Dear Editor. My son is in prison and won't be released until 2015. When he went to prison I cleared his room out and told the council that he had been sent to prison so that they could amend the rent.
I am a bit worried now about the bedroom tax issues. Would this affect me if the bedroom is empty because my son is in prison? I've tried searching for info on the net but I can't find anything on the subject of prison and bedroom tax. Thanks in advance if anyone can help me out. Anonymous.