Over the last two evenings I have had a further successful attempt at a new stitch for me.
I haven't found it as quick as normal crochet as I have to put the giant needle either under my arm or between my legs (don't ask too much about this last!) depending on the row I am on. I haven't found which is easiest but I have now got the hang of the stitch.
I am using a cheap acrylic yarn, in case anything went wrong, but it has some shading in it which I think is quite attractive. Thank you to http://www.stitchcraftcreate.co.uk/ who have this as a free download on their site.