i think that has solved the problem. When I first accessed printer settings, the Canon Color Matching was selected. Not actually sure what I did to unselect it, but next time it was colorsync and I have vibrant colour again. Hurrah! Many thanks.
HiI think I have a similar problem; muddy colours when LR manages colours but great if managed by printer. Correct ICC profiles for both Canon and Hahnameule papers. Could I ask that you repost the screenshots to guide me please? Thanks.