The one-day travelcard will be no more as the plug is pulled after consultation earlier this year.
What was once an open door to use all means of transport in the capital has fallen away in popularity since firstly the Oyster card with caps begun, and then contactless cards.
These measures have however seen controversy from those outside London who use it when attached to a railway ticket to the capital.
TfL state that they cannot afford to pay for after a recent financial agreement with the Department for Transport.
The DfT have demanded £500 million in annual savings as part of previous funding agreements and TfL estimate it will save £40 million through the measure.
Sadiq Khan has left the door open for the DfT to help with funding daily tickets.
Longer period Travelcards covering a week or month will remain from 2024.
Yet those one-day tickets which offered the keys to the city for so many will now be no more.