I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Short autumn evening flight over Brunswick Square. Take of and landing from Brunswick Gardens.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 04/12/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.
This area EGR160 THE SPECIFIED AREA is definately OK the restriction only applies to helicopters. I researched this fully before flying. There is a full expanation at What is the Specified Area within London?.
Annoyingly DJI have marked it as a restricted zone so you have to apply to unlock areas within EGR160 with them. The process is automatic and only takes a few minutes without any need to provide them with any permissions. I have unlocked pretty much the whole area for the next 12 months (the maximum period)