Indeed.
I am fortunate to have a 2nd, non-British, passport. I can't really determine from the Inter website whether I will be able to buy a ticket in Milan from one of their agents, using this passport. I can speak pretty good Italian, so I may be able to get someone I know in Milan to buy a ticket, but will I get in with it, would it be printed with the Italian's ID details?
Either way, I am reasonably confident that I will get in, despite being unlikely to get an away ticket. I had hoped that going to Israel might have given a pass for Milan, but I suppose the fact that Prague is a certainty post-Israel means I should stop being greedy and count my blessings...