Plenty of info online.

Many thanks, Propstrike. I’m sure that there is when you know what you are looking for!!!!!

The rear fuselage of the ULM which I photographed seems much longer than in the images that I have found on the net of Hummel Birds but, equally, there seem to be several variations on the basic theme. Can anyone further assist a poor ignoramus – at least when it comes to modern, non French or British ultralights!