Addison Lee drivers told to defy bus lane law (and to just say SMIDSY)

Isn't it your word against an equal? Always thought you could only complain as a passenger, or was that just black cabs.

It's not equal, there are TfL CCTV everywhere. "Your word against his" applies when there are no other records of something, but CCTV covers pretty much all of London's main roads and therefore it's "Your word + CCTV record, against his".