After a little bit more work on it my presentation was still in a sorry state, but as I created a PowerPoint with notes it seemed to come together. I've tried to steer clear of the typical PowerPoint blue and screens of text and bullet points. I simply transferred my pencil mind map to one slide where the four main points grow in about the most designy way I could manage with limited artistic skill.

S kindly sat through it which was very helpful. And not unrealistic in rehearsing nervousness. Not to mention this particular work colleague I can trust to be critical in the best sense of the word.

With some minor adjustment and a fair bit of practice it should be presentable in (it can't be?!) 10 days time.