If the descriptions of the location that I've seen are accurate, it's in a fairly steep sided cutting in the area of the map below.RE don't have much to offer here, civil industry is far better equipped. You are are going to need some serious lifting kit here. Think Liebherr 800ton cranes.
We used to have rail based cranes, I think Volker have some. Grayrigg they used road cranes to remove the rolling stock.
Either way it looks like a pig of a location. I saw footage of coastguard vehicles heading into the site so I'm assuming they need to use ropes to access.
I'm speculating, but it looks like stock may have rolled off down a bank or something like that.