The last screenshot in the second set that Scooty has posted seems to have too much grass for Manod, considering it is still being worked and the pic is clearly the bottom of a quarry. I am considering that, because Blaen y cwm, Cwt y Bugail (old) and manod are within a stones throw of each other, the BBC researchers just assume that they are all part of the same working, and called it 'Manod'? The pic i refer to looks a little similar to the old Cwt y Bugail !
I have to disagree, when that was filmed (and when I later visited) there were areas like that. Some is also visible in a couple of the other shots. It was taken on the far side of the pit (looking from Manod towards Blaenau) where there were large areas of old tip that had grass growing like that. A lot of it was buried when they started reworking the Graig Ddu pit on a larger scale not that long after first I visited.
I also disagree - for three reasons -
Watch the sequence and you can see the cyber-massacre all took place in the same location. There is much of it in the second Youtube link I posted last night (all at Manod, with the Raston Warrior Robot skilfully replaced by a rabbit).
The structure that looks a bit like the remains of a drumhouse behind Liz Sladen in the earlier picture can (I think) be seen in the background of that picture.
Finally, sheer practicability, I am not aware of any easy access to Cwt-Y-Bugail that the crew, actors and all their equipment could take. Even if there was, that would be a helln of a lot of effort for one shot.
Been injured while at work and are not to blame?
Get over it.