Originally Posted by
Max Tow
Possibly the reported joining might be a red herring, i.e. these might be two individual pilot seats which have been modified, otherwise why contour both?
Yes, it's possible that they weren't joined, though at this rate we'll have discounted pretty well everything in the description of them on that Facebook page.
Sticking solely to the photos, which can't lie, if they are actually single seats (whether asymmetric or not), then that would put the Heron and Dove/Devon back in the frame, so they could still be passenger seats (which would also explain the fittings for both seat-back and plug-in trays).