This item about Christiana is long overdue as they are a key producer of bakfiet type trikes and produce a very solid trailer. Based in Denmark, Christiana's products are available in the UK from Velorution and possibly elsewhere. The trikes and the trailer all carry a hefty 100Kg, the other dimensions for each type are given in detail on the Christiana website. The trikes can be had with a choice of 3, 5 or 7 gears and a reverse gear is also possible on the 3 & 5 speed versions! An electric motor is also available. Christiana have been building trailers since 1976 and trikes since 1984.
My only concern is that the bodies are 9mm marine ply and this could make them pretty heavy.