Detective Superintendent Andy Cox from the Met's Roads and Transport Policing Command has recorded a YouTube video in which he talks about the incidence of extreme speeding during the coronavirus lockdown and police operations against all speeding in London. He urges all drivers not to speed and passengers to ask drivers to slow down - speeding should, he says, be as socially unacceptable as drink driving.
The video also mentions average speed cameras on the A10, the police's use of dashcam and headcam footage submitted via the Metropolitan Police website, why he considers traffic policing to be an important element of fighting crime, and why it is less important to take action against cyclists who infringe than against drivers - because of the relative risks involved.
(The sound levels are rather low. If you are watching on a computer (Windows anyway, don't know about Macs) I recommend visiting www.matthewgatland.com/journal/2017-11-24-how-to-make-youtube-louder/. You can safely ignore most of the page - just scroll down to the bottom of the page to the section headed Bookmarklet and drag the "volume up!" bookmarklet to the bookmarks/favorites bar at the top of your browser. It works like a dream.)