Thanks Srek. Just been testing with Resolve and Optical flow and it does a good job at slowing down a 24fps to 5 % but that is all with static models. I shall do some tests with animated models. It may well be, as I am no Hollywood mogul, that I can get away with that...but I doubt it..not sure if I will live long enough to render at 450fps so I may have to try 60fps if 24 causes problems !!
Death by spell check..it decided that I needed to do some more testes.