It was Diane Abbot, I heard her on Q102 last night. To be frank, I don't think she knows what she's talking about as she suggested that Uber could tighten it's vetting procedures among other things. In fact TfL are responsible for vetting and licensing drivers. I'd imagine a Sir Humphrey type opined that the Mayor's support for inconveniencing millions of Londoners is "most courageous". If I was Mr. Uber I wouldn't give TfL the time of day unless it came begging for a resolution.