These are great names, but aren't there a lot of issues with these uk.com names? As far as I know, one doesn't 'own' the names, you merely have a arrangement to use a subdomain of .uk.com
An aftermarket in these names could be really successful though.
Have you had any success in selling these type of names? It would be interesting to know, if you want sales of .uk.com names is to take off.