I too am in the UK. When I am in a really bad way, certainly when I have been on steriods I see my consultant roughly every 6 weeks. When I doing ok I see her every 3 months. I have her secretarys tel number and can ring if I become bad and need to see her, I did this once a week before Xmas and she saw me on the 2nd Jan. I cannot believe that they are leaving you until November, that is unaccepatable. Your local GP if anything like mine dont really have a clue when it comes to treating crohns. It takes a while to find out the best course of treatment for you, and some of it is trial and error. Crohns is not predictable.
I think you should get back in touch with the hospital and voice your concerns, Say you are not happy to wait until November.