London's entire black cab fleet will be required to carry readers to process card and contactless payments as of Monday October 31st, Transport for London (TfL) has announced today. This is no great surprise, of course. The ball began rolling on the new rule late last year, and TfL set an October deadline this past March. For now, all that's asked of black cabbies is they have the facility, but from January next year readers will have to be mounted on the passenger side of the glass. Some hackney carriages have supported card payments for years, but for the majority of cabbies cash has remained king. From next week, though, it'll no longer be optional.