jpg giving 403 error – Photoshop

I have a lot of jpg files in a directory. One of these will not show on 3 different web pages (the rest all do). Trying to open it with a direct url throws a 403 error.

Used chrome and IE on 2 machines – no difference
Used Chrome Dev Tools and did empty cache and hard reload

The html is the same for all the images except for the file name.

I have code to show that the file exists – the web page sees it
Web page also shows the alt for the image

Spelling and extension are correct

Folder and permissions are the same for all files

I have changed the name

I have saved it in photoshop as a psd then saved again as a jpg (thought it might ‘clean’ the file)

I have converted it to a webp and that also gives a 403

I can open the file using explorer on my local machine, using photoshop on my local machine, and explorer on my web server – so the file does’t appear corrupt –

it just won’t open on a web page
I am using google/IIS compression but this hasn’t had any affect on several hundred other images

running on IIS 7.5

sample page below

https://kevin-sandbox.com/ovmp-dev/HtmlPage2.html

would anyone have any ideas on what might be wrong?
Thanks

Update
I added a screenshot to the HTML file showing
image – directory listing – permissions – log entry