If you arrived at Wimbledon 3 hours after touching in at a tram stop, I presume it would not just let you out but charge a maximum tube/train fare?
Is there a tram maximum journey time and is this publicly advertised anywhere?
A few years ago I was on a bus that was severely delayed in traffic. 2.5 hours after leaving Hammersmith some RPIs boarded and started checking tickets, but many passengers’ cards were coming up as invalid as they had been on since near the beginning (don’t know why the driver didn’t say anything, but the RPIs gave up and left once they got to someone who spoke sufficient English to explain!) So I believe there is a bus maximum journey time.