To show other users that you are free to talk simply go to the drop down box at bottom left of the Skype window and choose your status to be "Skype Me".
If you are serious about finding a partner this might be a route you would want to consider - don't forget, you don't have to subscribe unless you spot the partner of your dreams! At least we hope that their ban on Aliens is not discrimatory!They write on the site: "Our physical HQ is in London, England - but we're open to members from anywhere (except outer space)" They offer free membership with no catch.In most cases you can add a profile and search their members, all for free.On many of these websites your free membership will include contact from subscribed members.
Free UK dating websites are great - they are free after all!
Please note, however, that many subscription dating websites allow you to join for free.