Re: No mention of...
I haven't been able to find the original, official, statement about it from Uber, but one news agency claims Uber said "Greyball has never been used IN THAT FASHION in London", and others have said simply that it has never been used in London. It, or rather Uber's statement about the technology, was cited by TfL in 2017 for withdrawing their licence.
I don't know why I received a down vote... I thought if anyone would be in the position to clarify that association, it would be El Reg!