Hi Tizz,
I turned all plugins off and the website loaded the dektop version, as soon as i activated NextGen, it reverted to the mobile version. I have resolved it for now as I managed to find a plugin that doesn't suffer the same effect, but I should note that 11 themes suffered the same effect.
Now I have an issue with the NextGen Random Image widget, using that makes the page load time over 30secs!