> This data can track drug transporting and child trafficking, a letter from the National Police Chiefs' Council (NPCC) to transport body Transport for London (

> This data can track drug transporting and child trafficking, a letter from the National Police Chiefs' Council (NPCC) to transport body Transport for London (TfL) said. Note the use of 'can' instead of 'does'. Without more conclusive wording, I'd say this is just the police's (and Uber's!) way of justifying surveillance by implying, but not outright stating, that it's being used only against the worst crimes.