Something similar happened to me when I was about to take the train from Paris to London. I didn't have a reservation because I was planning my trip on the go.

Something similar happened to me when I was about to take the train from Paris to London. I didn't have a reservation because I was planning my trip on the go. The agent was not pleased at all with that, but as the train made the last call to board, he just scolded me, told me that next time I really should make a reservation before visiting England... and then let me pass.