There was no archaeological supervision (The site manager is not an archaeologist). The programme makers stuck sticks onto the ground on the figure so that the participants would know where to lie.
These were only removed when a local Pagan (me) told the CEO of Sussex Archaeological Society, who told the site manager to tell the programme makers to remove them. One of the researchers admitted this was a mistake. But nothing would have been done if I had not spotted the sticks in a photographic close-up. By definition, the sticks caused damage to archaeology, as they disturbed soil that was previously undisturbed.
Sussex Archaeological Society, the owners of the site, have failed in their cutodianship utterly, for the fiirst time, having previously been utterly worthy of out trust. As of this moment, effectively, local Pagans are the custodians of the Long Man, as it is they who have the best interests of the site at heart.
This cannot continue to be the case, obviously.
On the upside I was very proud to identify myself as a Site Inspector for Heritage Action.