Thanks for the feedback.
My main problem is I’m not conversant with the PHP workings of WP yet (far from it).
That said, as you’ve suggested, I’ve tried the absolute path (http://domain.co.uk/wp-content/images/image.png)
and the absolute path without the domain (http://wp-content/images/image.png)
When you say ‘absolute’ I assume you mean as if I were just simply trying to locate any other asset on the web. Or do you mean absolute in terms of a path that delves into WP…including the ‘uploads’ folder for example?
I am a little slow at times!!!
Thanks for your patience