When my son was a student, he brought his bike home in the holidays and back for term time. He doesn't drive and cycles everywhere so it is a necessity for him. One holiday, he'd booked the bike on the main train from London to Leeds as usual, but you can't make a booking for the 20 mile 'commute' to London. On that particular day there was a major cycling event in our area so bikes were banned just for the day. When we got to the station he was refused the bike so I had to drive him into central London at extremely short notice. We made his Leeds train - just- but it was incredibly stressful, yet no notice had been given to him of this one day rule. I understand it must be annoying for other commuters sometimes, but this was a Sunday and we were gobsmacked by the 'jobsworth' who insisted on the rule for my son, who was not involved in the cycling event, as the train would have been no more crowded than usual - especially as he'd paid for the ticket in advance. The rule was to prevent people cycling in the event but giving up part way and getting the train home, thus possibly filling the train with huge numbers of bikes.