Yes, it just required a winder on the main body, as some of you confirmed. I did assemble it in bits and, in my defence, I would say that this is very different to the 35mm cameras that I am used to. Without having examined one before, it was not immediately obvious to me that the winder on the film back would not cock the shutter.

Thanks for all those who contributed; at least my problem has enlightened more than just me!