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:
Berwick-upon-Tweed (UK Parliament constituency)
Table title:
MPs since 1885
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Election </th><th colspan=1 rowspan=1 > Member </th><th colspan=1 rowspan=1 > Party </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1885 </td><td colspan=1 rowspan=1 > Edward Grey </td><td colspan=1 rowspan=1 > Liberal </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1916 by-election </td><td colspan=1 rowspan=1 > Francis Blake </td><td colspan=1 rowspan=1 > Liberal </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1922 </td><td colspan=1 rowspan=1 > Hilton Philipson </td><td colspan=1 rowspan=1 > National Liberal </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1923 by-election </td><td colspan=1 rowspan=1 > Mabel Philipson </td><td colspan=1 rowspan=1 > Conservative </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1929 </td><td colspan=1 rowspan=1 > Alfred Todd </td><td colspan=1 rowspan=1 > Conservative </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 > Hugh Seely </td><td colspan=1 rowspan=1 > Liberal </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1941 by-election </td><td colspan=1 rowspan=1 > George Grey </td><td colspan=1 rowspan=1 > Liberal </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1944 by-election </td><td colspan=1 rowspan=1 > William Beveridge </td><td colspan=1 rowspan=1 > Liberal </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1945 </td><td colspan=1 rowspan=1 > Robert Thorp </td><td colspan=1 rowspan=1 > Conservative </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1951 </td><td colspan=1 rowspan=1 > Antony Lambton </td><td colspan=1 rowspan=1 > Conservative </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1973 by-election </td><td class="highlighted"  colspan=1 rowspan=2 > Sir Alan Beith </td><td colspan=1 rowspan=1 > Liberal </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1988 </td><td class="highlighted"  colspan=1 rowspan=1 > Liberal Democrats </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 2015 </td><td class="highlighted"  colspan=1 rowspan=1 > Anne-Marie Trevelyan </td><td class="highlighted"  colspan=1 rowspan=1 > Conservative </td></tr>
</table>
Question:
During which year's election did Anne-Marie Trevelyan win the Berwick-upon-Tweed seat, and who preceded her in that role?
Answer:
Since 2015, Berwick-upon-Tweed´s MP has been Anne-Marie Trevelyan of the Conservative Party, who succeeded the longest serving Liberal Democrat MP Sir Alan Beith.