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:
1955 South Norfolk 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 class="highlighted"  colspan=1 rowspan=1 > Conservative </td><td class="highlighted"  colspan=1 rowspan=1 > John Hill </td><td colspan=1 rowspan=1 > 15,119 </td><td colspan=1 rowspan=1 > 51.5 </td><td colspan=1 rowspan=1 > −3.0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > Labour </td><td class="highlighted"  colspan=1 rowspan=1 > J.M. Stewart </td><td colspan=1 rowspan=1 > 14,254 </td><td colspan=1 rowspan=1 > 48.5 </td><td colspan=1 rowspan=1 > +3.0 </td></tr>
<tr> <th colspan=3 rowspan=1 > Majority </th><td class="highlighted"  colspan=1 rowspan=1 > 865 </td><td class="highlighted"  colspan=1 rowspan=1 > 2.9 </td><td colspan=1 rowspan=1 > −6.1 </td></tr>
<tr> <th colspan=3 rowspan=1 > Turnout </th><td colspan=1 rowspan=1 > 29,373 </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 > Conservative hold </td><th colspan=1 rowspan=1 > Swing </th><td colspan=1 rowspan=1 > −3.0 </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
Who won the election and by how much?
Answer:
The result was a win for the Conservative candidate John Hill, with a majority of 865 votes (2.9%) over his opponent, the Labour candidate J.M. Stewart.