Thanks to some suggestions (Vicky and Robyn and others?) I had another go today at lunch using only Winsor blue(yellow shade) perm rose and burnt sienna. If I mix the purple first then add the bs it works easily.
Not sure what my problem was last night. Was it the Daniel smith phthalo or the fact that I tried a mixed orange with it. Definitely pb and bs make green so need perm rose
I will set up my minimal set tonight.