Thanks for the pointer. As you would expect the software is primarily for gaming, not much there for modelers, but great shortcuts for internet browsers.
Thank’s Dave. The Nulls are being created by Duik. Basically, you select your pins within Mesh > Deform and then click the Bones button in the Duik panel and it creates an IK rig. this tutorial I’m following the above tutorial click for click, and all is as should be apart from this issue. I thought it might be a setting in the panel view options, but no…