Hi Lee D. Thanks for your suggestions. Print previews are in colour, the photo is described as sRGB etc. I cant see anything on the printer driver settings which says greyscale or black and white. However if I set the HP properties to colour prior to printing, then click back before pressing the go button, I find the properties have been reset to monochrome. Printing from my phone produces an ordinary colour picture. The problem only seems to happen if I try printing a photo with the affinity logo before the file name, whether via Affinity or other software.
Robots have taken over!
Corner