Thanks for replying Dave.
I have now reimported the image in question and there is a difference between the appearance in Library and Develop mode. It is exactly the same as the file I exported. So the view in PS or browser looks like the version in Library not Develop.
I’ve just been checking and all images in Lr are showing a difference between Library and Develop mode even those that I have not edited. The Develop mode shows more saturation and clarity, possibly oversaturated possibly.
I haven’t done much in Lr recently and am wondering if there could be some connection with the fairly recent update.
I will send you a word doc with two screen saves to show the difference I am experiencing. (Don’t know how to convert to jpeg to attach here, sorry)