It appears your building a new website that will eventually be live athttp://robbinscs.co.uk/ ???

Or ishttp://robbinscs.co.uk/ the current site you are having this trouble on?

First of all I created a hosting package on my server for robbinscs.co.uk and then uploaded Concrete 5 onto it. I then went on to build the site in its entirety before pointing the domain at the server as I did not want the original site to disappear before completion of the new one. It was not until I had completed the site and pointed the domain that I discovered the addresses to all start withhttp://212.48.91.24/robbinscs.co.uk/whatever....

Is there some way of changing the canonical URL to remove the IP address?

Well it looks likehttp://robbinscs.co.uk/ does not load the concrete5 site at all. I think the issue here can't be solved from the concrete5 dashboard, as its not whats being loaded when someone goes to your URL. What are you using for hosting? Your server needs to serve the concrete5 directory when your URL is accessed.

Knowing that my server is compatible with Concrete 5, there are several sites already using it, I guess it might be easier to load everything again from scratch as the site is only a few pages. However, I do have this issue with another site I did in the same manner.