wp.cs.ucl.ac.uk is a multi-site WordPress site.
As such all efforts are taken to preserve the integrity of all the sites hosted here.
New sites will be sub-directories of this site. For example: http://wp.cs.ucl.ac.uk/sitename
This will be used for all personal sites.
For group sites, http://sitename.cs.ucl.ac.uk may be requested. This will be mapped to http://wp.cs.ucl.ac.uk/sitename
Alternatively, if you have an external domain, that can be forwarded to wp.cs.ucl.ac.uk and mapped accordingly.