Thanks for the responses.
I have set up the sharing OK , Anyone with the link etc. I also shared with myself on another of my non-google email accounts which was all OK.
My recipient indicated no error message but what he saw I don't know - a business so not easy to find out. When he replied that he couldn't open the pix my email to him was also shown which had all the pix links which I could open with a click and also the 14 rather large thumbnail pix showing! How this came about I have no idea - rather nice though. I replied to him from this email hoping that the reply would also contain those thumbnails as well but it didn't happen it seems.