Referring to lessons 8-6 and 8-7 of the Essential Skills tutorial:
Although I think that I have answered my own question, I had a little confusion when following the above 2 lessons in order, in that during 8-6 you show how to get a Sharing Link from within a workbook saved on to a Onedrive. For the purpose of this particular lesson you chose to create a 'View Link' share, which can then be used as a hyperlink to embed in an email, website, etc. All clear with that.
In 8-7, the following lesson, you then go on to show how to use the browser-based Onedrive account to share the workbook (in this case Smartphone Sales) for the purpose of demonstrating simultaneous editing by multi-users with whom you share the link.
The problem here is that (in my case anyway), having left the Share Link originally created in 8-6 as a View Link, the option that is presented in the 'Share' window of OneDrive browser is 'Anyone with this view link', and not 'Anyone with this edit link', as shown in lesson 8-7.
Does the above make sense to you, or have I missed something within those 2 lessons that is glaringly obvious?