free
Saturday morning, Clapham Junction station - "The busiest train station in Britain".
Me: can I have a return ticket to Brighton, please? Coming back sometime tomorrow.
Ticket attendant: That'll be 19 pounds. You have just missed a train, the next one leaves at…
Me: That's alright, I'm meeting a friend who's on the 8:42.
Attendant: Yes, you and everybody else. Ha! I shall say no more. Have fun. [attendant sighs]