As the owner of a .co.uk, you get first dips on the .uk of it.
I like them, because they're shorter easier to type in. Important that you have both for now, though, as people are not used to them yet, and will assume when you say "uk" that you mean "co uk".
Apart from the 'co' bit, there are no differences between '.uk' and '.co.uk'.
As for privacy, there's info on how to opt-out of the Nominet database here:
https://www.123-reg.co.uk/support/answe ... ount-1522/
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Grim... wrote:
I wish Craster had left some girls for the rest of us.