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Rel canonical is definitely NOT the preferred way to handle this kind of situation, IMO, Zach. Best practice is to run the 301 redirect to give the Search Engines (and users!) the clearest message as to the Fully Qualified Domain. This isn't a matter of the 2 URLs needing to exist, which is when you use rel canonical. The second variation serves no possible useful purpose, so should be redirected in order to get rid of it altogether.( In my experience, rel canonical also doesn't seem to reliably pass page influence the way 301s do.) For example, by doing the redirect, the URL will always appear in the address bar as the www version, so if someone copies that address, they'll always end up using the canonical FQDN. That said, Richard, you can also use Google Webmaster Tools to tell the  Search Engines that you want your www version to be considered canonical. It's just one more way of signalling to them. Once this is working, you're going to want to be very careful to always use the FQDN yuorself - ie always write links using the full www.weddingdancelessons.co.uk, whether on your own site or when you're getting links back to yourself.