This reddit comment has a good summation, copied below.
"There's something weird going on with this Dobby pipeline story and I just cannot figure out what. I've seen so much discussion about it and there's just absolutely zero evidence for this actually happening aside from one little anecdote from a podcast.
It seems to have originated from this interview at 16:55 with Simon Ludlam, who was the project director for Greenlink. I've searched and searched and can't actually find any evidence of this interview he mentions, let alone any indication of there being backlash.
First of all, this happened years ago. The consultation was in 2018, the cable was laid starting in 2022, it was tested at the end of 2024, and it's been in use since the start of 2025.
The cable wasn't dug into the top of the beach, it was drilled horizontally underground (point 7 here). This has evidently been the case since at least October 2018, and from what I can tell the route under the beach did not change between then and October 2021 when it was finalised.
The archaeological survey was done in 2019, and the commitments to not go close to any of the archaeological sites was made in October 2020. From what I can tell it was also offshore, so it was more about the routing before the beach.
And finally, the part that imo makes this whole thing nonsense - Dobby's grave is on the south side of Freshwater West, and right from the earliest proposals I've been able to find (page 63, October 2018) the interconnect has come in through the north side.
From everything I can tell, this story is just completely false and it's all stemmed from one guy's embellishing of the truth for an anecdote on a podcast.
If there's any discussion that should be happening, it's the fact that there are 30 different public PDFs, and this absolutely insane 350 page behemoth of absolute waffle on every single possible detail that I'm fairly sure absolutely nobody will have read. There really is a point where planning consultation gets massively out of hand, lol."