Do you mean the new A1M section at ferrybridge, ?
Yep that's the place!
Certainly no-where to safely pull off the road anywhere although you'd be quid's in if you had your own boat and could get up that river!
It does seem a little odd as to why they'd be running older Terex coal scrapers at that site. Isn't there a more modern same-capacity equivalent out there? Having said that, I certainly wouldn't be complaining if I managed to get pictures of them, working or not!