The other Gwynedd constituencies, however, Arfon and Ynys Môn, are within the North Wales electoral region.

The Mid and West Wales region consists of the constituencies of Brecon and Radnorshire, Carmarthen East and Dinefwr, Carmarthen West and South Pembrokeshire, Ceredigion, Dwyfor Meirionnydd, Llanelli, Montgomeryshire and Preseli Pembrokeshire.

The seat had been represented since its creation in 2007 by Dafydd Elis-Thomas of Plaid Cymru, the Assembly's former Presiding Officer.

He previously represented the former constituency of Meirionnydd Nant Conwy from 1999 to 2007, and was the Westminster MP for the area from 1974 to 1992.

These notional results, compiled by professors Colin Rallings and Michael Thrasher of Plymouth University, take the figures from the 2003 election and apply them to the new boundaries which are being used for the first time on 3 May 2007.