It's true that you can get a cheaper (but still very expensive by the standards of anywhere else) ticket by booking for the middle of the day and weeks on advan

It's true that you can get a cheaper (but still very expensive by the standards of anywhere else) ticket by booking for the middle of the day and weeks on advance, but if you need to travel at short notice or for a fixture during the day, you can expect daylight robbery for standing room in someone's armpit in a vestibule for 90 minutes.