I don't have Des Pawson, and believe it or not, I was just at the library the other day, and I looked at just about every book on knots I could find, and do not recall seeing it there either. The lanyard knots do see like a good and practical idea, and I might give them a try, but according to the manufacturer's website, it's a variety of the Turk's Head Knot. I do appreciate your suggestion though.
I have made a close resembling thing from a 3 lead, 4 bight Turk's Head Knot. The only thing is, is that although it looks very similar, it's only made out of one strand, whereas the description on the website and the video of their production on youtube show multiple strands. Any idea on how to make a Turk's Head Knot from multiple strands?