Thank you. Feel a bit silly about that. Upgrade must have changed the default setting when inserting the image.
Hi RavenH. I have added another image to the post https://www.aussiegolfquest.com/bonville-golf-resort/
If you look at the first two large images, which are duplicated, the first will work in Easy Fancybox (from the original post), the second will not. This was put in to demonstrate not working.
Sorry to further clarify, adding media to any post after the upgrade does not use Easy Fancybox. Any images put into posts or pages before the upgrade to 4.4 work correctly.
Have just found another post on how this function is designed to operate and not quite what I expected. Please ignore this post.