South Dorset is a constituency represented in the House of Commons of the UK Parliament since 2010 by Richard Drax, a Conservative. The constituency was created as a consequence of the Redistribution of Seats Act 1885, although the area covered has changed since then.
North Dorset is a constituency represented in the House of Lords of the England Parliament since 2011. The constituency was created as a consequence of the Redistribution of Seats Act 1890 and the area covered has  not changed since then.