Thanks t-p.
Well I seemed to have solved this by deactivating one or two of my plugins that I am not using at the moment.
I was then going to do a block deactivate to see if the home page showed, but I didn’t need to it just started working again.
I read somewhere during my hours of searching for a solution that the redirect plugin caused another user the very same problem. That is one of the ones I deactivated.
Maybe on this upgrade there is a problem with conflict with that one.