bocadillo
Water Gypsy
I stand to be corrected here, but I believe a lot of people have a say in the fixture list. I understand that a computer produces a draft fixture list and this is then subject to revision after submissions by the police, British Transport Police, the clubs themselves and also, I think, The Football Supporters' Federation amongst others. The British Transport Police will try ( not always with success ) to have clubs who are particular rivals not travelling on the same line.
I believe that the clubs and the police have a say before and after the drafting of the draft fixture list.