I just found that I have more selections on the left
Applications
Content
Sync
Advanced
Under Advanced there is "View Certificates" so I will carry on there.
There is a tab in the Certificate Manager called "Authorities" with an import tab, should I use that?
Just found under Advanced a
ticked box "Query OCSP responder servers to confirm the current validity of certificates" should I just try unticking that since it seems to be related to the fault?