Ah, that's what i thought.
So it looks like there is no way round it then.
investigating further, the animation doesnt even have to be looped for this problem to arrise, it just has to be playing out (and not finished) and while the animation is playing if the user tries to advance the slide - again it sill just stop the animation from playing first and then awaits another click to advance.
This could obviously cause problems with the flow for the presenter on the day.
Thanks again for your help!