True to TfLs new year promise that the unlimited hopper fare would be introduced this month, it has indeed gone live today. You can now make as many bus or tram journeys as you like within an hour and only be charged one fare of £1.50. I’m already aware of one person (Geoff Marshall) who has made 25 journeys up and down one road, so it definitely works.
At the same time you can now also make a rail/tube/dlr journey in the middle, so bus to station, train to town, bus to the office will only cost £1.50 plus the rail fare