We are seeing issues once again with anonymous access to the wiki, and are working with our supplier to remedy the issue.
As this is only affecting access to users not logged in, please use the link below to log in to the Wiki as a workaround for these issues:
https://id.atlassian.com/login/saml/start?connection=saml-391288ed-fb01-4f33-a6ea-de388616a066&continue=https://uoy.atlassian.net/wiki
We will provide further updates once we hear back from Atlassian.