I stumbled upon what I now know to be the train ferry quay completely by accident, last Friday (14th) whan I was out on a photo rummage (being a keen amateur photographer). I spotted the structure in the distance and slowly headed over, I took a set of pictures which you may be interested in
The rest of the set can be found herehttp://www.flickr.com/photos/92090785@N03/with/9049336533/
along with some of my other pictures.
I did a lot of reading about the port and didn't realise the size of it, I can remember the railway that crossed the sandwich road just before the power station, never gave it a second thought as to what it was for, but I did have a look and at least one of the original gate posts is still there marking where the line crossed the old road, everything to the south of the road is long gone.
I will be going back to do some more pictures and will post them here when done.