This is the structure I had for my presentation:
Intro- the actual subject of my EPQ (ebola), what it is, key facts etc.
How I chose what I did (the process of changing my subject, narrowing it down)
Research- method, best bits (I did a few interviews so put a lot of focus on these, with profiles on the experts I interviewed and recordings etc.) You could put how you recorded what you found during your research and how easy it was to refer back to these when writing- odpn't worry if it wasn't great! They really like a lot of refection.
Key findings- basically the key points from my conclusion
What lessons I've learnt (ie. what would I do differently if I were to do my EPQ again)
What the EPQ has taught me (what transferrable skills I've learnt)
Other areas of research I came across and was interested in but wasn't able to talk about in my essay due to word limit and relevance
I'd say bear in mind that they're not looking for a presentation of your essay, which is what I did during my draft presentations. They're looking for an overview of the entire process- so whilst you should include your topic (obviously), focus more on key facts and your overall conclusion so that you have time to talk about the whole process of completing your project.
Hope this helps!