I think the whole story is flawed. I'm sure we've all heard rumors about ww2 items being buried in certain locations but I doubt whether I believe any or many of them. The issue I have, is where is the logic in burying X amount of Spitfires, worth a ridiculous amount of money. I would have thought if the UK government didnt want them they would have sold them.
The other issue I have is reciting the memory of a WW2 veteran about this, humans have an amazing ability to tell themselves that something has happen and after time actually believe it, based on little to no evidence. No I think this person has only a vivid recollection of the event and has jumped to conclusions.
I doubt they'd find anything, if they do it'll be a couple of spare parts.
