Default fresh install of Blender, reset my preferences
When I go to add an Environment map and use HRDs (which had previously worked) from HDRIhaven, the renders and views only show an amalgamated colour (e.g. mostly flat blue for a sky, or beige for an indoor scene).
I’ve switched between Orthographic and Perspective view with no difference. Every forum I’ve looked at for help only has this as a fix and otherwise state that they should be plug and play.