Sooooo, I have taken on board DFs suggestions for pattern sizing, had a read and view of several of Morgan's informative posts, looked in my sewing books, and now know how little I know about what I am doing.
Regardless .... I've removed the long body darts which gave me the space in the belly I needed.
And I've increased the length of the bust darts to point to my own measurements ( to which dolly and I differ, I'm not as perky as she).
Presumably I now deconstruct my garment and redraw my measurements on the pattern? More research here I come.