A further note: On the SquareSpace settings for my web site, it says I can "Use a Third-Party Domain". If I enter my preferred domain name, it says I can't transfer the name, because "org.uk domains are not currently supported". However, it gives me the option to "Connect the domain to your Squarespace web site". I don't understand what this does. If I connect the domain, will it solve my problem of the old domain name being displayed?