Let's look at that.
It's a football match, at a location on the edge of town, with 28,000 people attending (twenty eight thousand, to be clear), all trying to get to the same place at once. It's not your FAULT, as such, as the trains were a bit bollocksed tonight. But sometimes that kind of...
As far as tonight goes, we were at Brighton an hour before, got in the queue (almost outside Brighton Station by that point), saw on Twitter that trains were being cancelled, and immediately wandered off round the back of the station to hail a cab. Screw that queue.
Got to the ground by about...
Exactly this. I think you do need to build a bit of trainshittery into your travel time, as 7:15 doesn't leave a lot of margin for error if it's One Of Those Days on the railways.