I'd love to drive that ...
it doesn't look like it handles that differently from a normal 45' curtainsider trailer. The overhang on the lorry I used to drive in my last job, both at the front and the back of the trailer, was much the same as on that; those steering axles in the middle make all the difference.
It makes sense, in many ways - although his previous design for one of these, which was two standard 45' trailers being towed by one unit, with a weight limit of 60 tonnes, made more sense, if only because you could trunk two trailers to a depot near the motorway, then split the truck into two "normal" artics to deliver the stuff to the customer's premises. Certainly when I was on palletised general haulage, which is also Denby's area of operations, we "cubed out" far more frequently than we "weighed out", even with a 16' high double deck trailer. These things would be ideal for many of the jobs I used to do.