Think about what you just said and then think about other people have lives outside of just going to football.
Much like why people leave early, there will be reasons people will need to leave later than some, not to mention the trains were a nightmare, just getting into Brighton.
I was on that train, pissed off was an understatement, I got to my seat in the WSU 15 mins into the first half, the train was due to leave at 13:12 from Brighton