Addendum to previous post:
I just tested by uploading an older version of Jetpack to my site and activating it, with the same results. So I imagine I will have to wait for some more in depth solution from here to solve the issue.
Just a couple of technical points, my WP is fully up to date, I have tested the site with all plugins deactivated, except for Jetpack which does not allow me to deactivate as mentioned before, I have tried it with various themes with no effect. I can’t seem to find the correct DB for Jetpack on MySQL either.