Was interested to know it was standing in amongst several golf courses in Newbury.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 26/04/2023. It remains the responsibility of any pilot to check for any changes before flying at the same location.
In short, to fly any EH site, you need their permission and the appropriate certifications and Insurance (they are probably referring to commercial operators with GVC, etc.).
This is good news to me, because I would love to fly over the edges of some EH or NT sites in the future. If I do, I’ll likely do it out of visiting hours and certainly only take off from public land…and all within CAA regs and NOTAMs of course.