An interesting observation I can’t explain from early on 12/12/21 morning (using both the 11/12/21 Night Tube and the first train of 12/12/21).
I tapped in at St Paul’s at 4:20 and tapped out at Waterloo LU (Jubilee) at 6:31. I expected to be charged for two incomplete journeys – fair enough. However, I was actually charged £2.40, the correct single fare. I used contactless, not tied to a TfL account, so I have no journey history to consult, but based on the fares it seems clear that the system accepted the two taps as constituting a valid LU journey.
The maximum journey time should have been 100 mins on a Saturday or 110 on a Sunday – both well below the 131 between tapping in at St Paul’s and tapping out at Waterloo.
Any clues as to why the system chose to be merciful?
It is possible that the contactless system has been told to be generous in light of the industrial action currently taking place. My best suggestion is to link the contactless card or device to your TfL account because then you’ll be able to examine the journey history. You can get access without linking, but it’s only for a short window, while linked cards retain history for 12 months.