You've got an argument as to why one Uber car is less congestion-causing than one black cab, because of these regulations. And a list of reasons you don't like black cabs.

What you haven't got is evidence that Uber, by making cab travel cheaper, aren't making things a whole lot worse.

Black cabs are a distraction in this argument. It's Uber vs not-Uber. Trying to frame it as purely a protectionist matter is misleading.

And to add to that, it’s only Uber, not app-hailed minicabs as a whole.

If TfL were banning all minicabs then I could see how a conversation vs black cabs would make sense. But this is just one operator that has flouted regulations other app-based companies have not. They will be more than able to fill the void left by Uber.