Yeh thanks to both the above posts suggesting additional frames outside of a beginning frame of 0/1.
But I’d tried that and that didn’t work either.
I did render my particle frames in the end but don’t remember the magic ingredient that got things working.
Not very helpful I know!
Just wish sometimes things were a little better documented since being able to render particles is a pretty big thing so you would have thought critical factors such as this would be well documented.
Maybe it is now but I found very little in terms of generating particles and rendering them via MRQ.