Hi Kev,
attached are my own pictures of the Whitefriars lace twist circle. It uses bundles of rods similar to another weight I have from 1972 except that the small centre green bundle goes all the way through the dark blue base. The cutting works well with the circle (hexagon) of lace twists creating extra circular images. Not sure why Whitefriars would not use this design generally as it is very effective.
Cheers,