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:
1956 Blaydon by-election
Table title:
Votes
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Party </th><th colspan=1 rowspan=1 > Candidate </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th><th colspan=1 rowspan=1 > ± </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Labour </td><td class="highlighted"  colspan=1 rowspan=1 > Robert Woof </td><td colspan=1 rowspan=1 > 18,791 </td><td colspan=1 rowspan=1 > 69.94 </td><td colspan=1 rowspan=1 > +3.47 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Conservative </td><td colspan=1 rowspan=1 > John Reay-Smith </td><td colspan=1 rowspan=1 > 8,077 </td><td colspan=1 rowspan=1 > 30.06 </td><td colspan=1 rowspan=1 > 3.47 </td></tr>
<tr> <th class="highlighted"  colspan=3 rowspan=1 > Majority </th><td class="highlighted"  colspan=1 rowspan=1 > 10,714 </td><td colspan=1 rowspan=1 > 39.88 </td><td colspan=1 rowspan=1 > +6.94 </td></tr>
<tr> <th colspan=3 rowspan=1 > Turnout </th><td colspan=1 rowspan=1 > 26,868 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=2 rowspan=1 > Labour hold </td><th colspan=1 rowspan=1 > Swing </th><td colspan=1 rowspan=1 > 3.4 </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
Who won the 1956 Blaydon by-election, and what was the majority margin of victory?
Answer:
In 1956 Blaydon by-election Robert Woof won with a majority of 10,714 election.