The readcube account is necessary for access to articles available through readcube; it also keeps track of what articles you have read and stored.
1. Follow the login/register link in the top right corner to register or to login when you initially come to the readcube site via a nature.com article from a title on the UK readcube journal list using any UK-specific database that indexes any of the UK readcube-enabled-journals [e.g., Google Scholar (UK), PubMed (UK)] or by going directly to the UK-subscribed Nature site [accessed from this guide or from the Libraries' website]. In UK-specific databases, use View Now at UK to find the link to nature.com; all readcube access will be on the nature.com site.
If you attempt to view a readcube article but haven't yet registered for an account, you will be prompted to register at that point (see below: Creat New Account).
Once you are registered, you will then be able to log in and view the article via readcube.