Sorry for the confusion, I'm not explaining what I'm trying to achieve very well.
In, the first post I said that I wanted to "change how the text flows on individual pages", not between pages, so sorry if that wasn't clear. Again, this works perfectly between a file set-up with non facing pages.
The original file enclosed was just a test file to illustrate the problem I was having which you explained perfectly so thank you.
The vertical facing pages example is what I'm working with and I agree should have shared that in the first place to avoid confusion. I was tying to keep things simple and achieved the opposite, sorry.
As I see it I'm going to have to copy and paste the dates pages directly onto the relevant pages rather than using master pages. I was just trying to avoid having to make changes to proportions etc on each individual page in the future by using master pages as works with non linked text boxes or image boxes.
Thank you for looking at this for me.