Mark, I have an Epson V600 scanner but it is not colour managed. You mentioned that you have printed using the P800 on Ilford GFS paper with both an Ilford and custom profile and that the blues were corrected. This would seem to suggest there is something wrong in my workflow rather then the profiles. Is it possible that the PA302W is calibrated incorrectly for this paper?
Wayne, the prints have purplish blues and the colour on the display is correct. The test images has not been modified. I do not have a Solux light source but have viewed the prints under a varied of lighting conditions and the blues are purplish.
Any suggestions where I go from here?
Andy, if you have a V600 scanner, the software driving the scanner, whether it is EpsonScan or SilverFast would have built in profiles, in this case for reflective colour scanning, so you can likely use it without worrying much about the colour management - worth giving it try anyhow.
The P800 and the profiles for Ilford GFS are wide enough gamut that the blues in Andrew's target print should not come out purple. The Ilford profile is pretty decent, but a well-made professional custom profile would be likely superior, if only because it is customized to that very printer, rather than Ilford's printer notwithstanding that the model is the same; manufacturing tolerances are pretty tight these days, but one never knows what performance variance there may be between Ilford's P800 and yours.
The reason for using the target print is that the colours are familiar and known, so what you see on the display doesn't matter, as Wayne mentioned.
As I mentioned above, when I looked at your settings I didn't see anything obviously wrong with your workflow.
The one thing we haven't seen yet is what those purple blues really look like - as I suggested, could be helpful if you could make those scans and let us see the problem "in the flesh".