Hi Pat,
Thanks, I have tried restarting and then also fully shutting down the computer and starting again over a few days but but no luck. I've read through some various posts to see if it something obvious I have clicked off. In doing so I noticed that it is possible to turn textures off through the "OpenGL Options' and so checked this and even this is on but greyed out, which I haven't been able to find an explanation for either?