Im confused. From what I see, Some on this thread are speaking like... "I would buy a .UK name if it was .UK alone... not .CO.UK though cause it's useless".
If you want .CO.UK names... then get them! They're steaming hot right now, millions of registrations, 4th most popular extension (1 =>.COM, .NET, .DE, 4=.CO.UK).
Don't push it aside because its got two parts to the extension.
There is no need for the stand alone .UK name extension... any Brit will tell you that they don't expect it to be .UK. It's .CO.UK.