<p>Does the red ring indicate a Canon L series lens? Long hood, short lens.
</p><p>I was going to blur faces until I heard about the strange "illegal to cover your face" stuff, now I'm just going to document things as they were: rather spooky and intimidating. 
</p>
It can't be fun for the police photographers either.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/93001633@N00">Pete Birkinshaw</a> from Manchester, UK
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/binaryape/2872752059/">Photocops at the BBC</a>