I hope that anyone waking up to reflect that riot police broke up peaceful political protests at two of the world centres of freedom of speech - Trafalgar Square and Speakers Corner - feels ashamed of what this once great country has become. https://twitter.com/metpoliceevents/status/1309852211225276416

It also appears that the police acted unlawfully in breaking up the protest. The two relevant parts of reg. 5 of the No. 2 Regs (as amended) are below. If the risk assessment was undertaken and the organiser took reasonable steps to limit transmission, the protest was lawful.

It doesn’t cease to be so by virtue of the behaviour of the protesters if (which is not established) they didn’t comply with the risk assessment.

This of course is not to take account of whether requiring such conditions is a breach of the right to freedom of assembly and freedom of expression protected by Articles 10 and 11 of the ECHR. I believe that they are not.