You use the same account no matter where you go - thats the beauty of skype.

To get a UK landline number - what you're after is the skypeIn service - for pricing info, click here: Free Calls and Internet Calls with Skype

SkypeIn is down as "Receive calls from phones and mobiles" in the table - If you want to see prices in Sterling, switch the currency at the bottom of the table using the drop down box.