Reading the reporters twitter and his article it looks to me that the Met legal played a clever hand in front of the Judge
The Vigil organisers legal team said the ban was not taking account the Human Rights Act. That the Police had wrongly told the organisers there hands were tied and they had to ban the vigil.
When it came in front of a Judge the Met legal team said the Met had no blanket ban.
It sounds to me like the Met told the organisers there hands were tied. The Met legal team realised this would not go done well in front of Judge. So changed the story. Thus undermining the argument from the Vigil organisers legal team.
So as the journalist says in his BBC article:
."
A High Court judge refuses to intervene in the action against the police ban on the event.
www.bbc.co.uk
Looks to me that the Met legal team decided to concede the point knowing that Cressida Dicks Met will not be seriously talking to the vigil organisers.
The Met have achieved their aim of disrupting the vigils taking place legally.
However in conceding that Met have no blanket ban it begs the question why the Met did not work out a deal with the organisers. Who were making efforts to organise a vigil that took the pandemic into consideration.
My view is that the police were worried about high profile campaign like the BLM protests.
Having a pandemic works in authorities favour in keeping a lid on protest.