alt Hacker News"This" ?
Which this?
They apparently moved the location, but protesting at the new location is still heavily restricted [0] with a dystopian narrative.
> In order to achieve the balance between the rights of those holding a rally and the rights and freedoms of others to go about their business we have put together this guidance and simple application process.
[0] https://www.london.gov.uk/who-we-are/city-halls-buildings-an...
Every single thing in the text you (inaccurately) quoted.
City Hall is no longer on a private estate, no Kuwaiti investment company is involved, and the application process involves no "corporate permission" - you submit a form to the city government, and it sounds like the point is to make sure each rally is allocated a separate area, and they don't deny permission outright.