Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
The Lazy Song
Table title:
Release history
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Country </th><th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Format </th><th colspan=1 rowspan=1 > Label </th><th colspan=1 rowspan=1 > Ref. </th></tr>
<tr> <th colspan=1 rowspan=1 > United States </th><td colspan=1 rowspan=1 > February 15, 2011 </td><td colspan=1 rowspan=1 > Mainstream radio </td><td colspan=1 rowspan=1 > AtlanticElektra </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > New Zealand </th><td colspan=1 rowspan=1 > February 18, 2011 </td><td colspan=1 rowspan=1 > Digital download </td><td colspan=1 rowspan=1 > Elektra </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=2 > United Kingdom </th><td class="highlighted"  colspan=1 rowspan=1 > May 8, 2011 </td><td class="highlighted"  colspan=1 rowspan=1 > Digital download </td><td colspan=1 rowspan=1 > Unknown </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > May 9, 2011 </td><td class="highlighted"  colspan=1 rowspan=4 > CD single </td><td class="highlighted"  colspan=1 rowspan=1 > Warner </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > Germany </th><td colspan=1 rowspan=3 > May 27, 2011 </td><td colspan=1 rowspan=3 > Elektra </td><td colspan=1 rowspan=3 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > Austria </th></tr>
<tr> <th colspan=1 rowspan=1 > Switzerland </th></tr>
</table>
Question:
How was "The Lazy Song" released in the UK?
Answer:
On May 8 and May 9, 2011, the Lazy Song was released in the UK via digital download and as a CD single, by the Warner Music, respectively.