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:
Cardiff West (UK Parliament constituency)
Table title:
Members of Parliament
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><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1950 </td><td class="highlighted"  colspan=1 rowspan=2 > George Thomas </td><td class="highlighted"  colspan=1 rowspan=1 > Labour </td><td colspan=1 rowspan=1 > Previously MP for Cardiff Central from 1945. Secretary of State for Wales 1968–1970; Chairman of Ways and Means 1974–1976; Speaker of the House of Commons 1976–1983 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1976 </td><td class="highlighted"  colspan=1 rowspan=1 > Speaker </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1983 </td><td colspan=1 rowspan=1 > Stefan Terlezki </td><td colspan=1 rowspan=1 > Conservative </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1987 </td><td colspan=1 rowspan=1 > Rhodri Morgan </td><td colspan=1 rowspan=1 > Labour </td><td colspan=1 rowspan=1 > Assembly Member for Cardiff West 1999–2011 and First Minister of the Welsh Assembly Government 2000–09 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2001 </td><td colspan=1 rowspan=1 > Kevin Brennan </td><td colspan=1 rowspan=1 > Labour </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What party did George Thomas originally represent, and what party did he become in 1976?
Answer:
A Labour seat, represented by George Thomas, who became Speaker in 1976.