Rob Morley writes:

But they also stopped cyclists behaving legally, advising some to
wear helmets and hi-viz.

Oh dear. I wonder if that was just a display of individual ignorance,
or if they'd been told to do it.

You can usually rely on the individual ignorance of the ones who
volunteer for this sort of task without having to tell them to do it.
There were almost certainly briefings telling them where to stand,
though. They could hardly have been better positioned to miss lots of
lawbreaking: URL:http://www.youtube.co.uk/watch?v=K51FRxJBb14.

--
Mark