Thanks to a lovely suggestion, I have been looking into Irish Cottage knitting as a way for throwers to speed up their knitting style. This video makes fascinating watching. Look how fast Yarn Harlot knits!!! No wonder she produces so much knitting as well as writing books, going on book tours and lectures:-)
I'd heard of a Shetland style that held one needle still under the armpit - sometimes using a little holder - but I never knew what it was called or seen it in action.
I think this will take a bit of practice to get the hang of but I won't be bothered by miles of st st patterning again if I can crack this!!