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It is the smallest constituency on the mainland of Great Britain by electorate, and larger only than the two Scottish island constituencies, Na h-Eileanan an Iar and Orkney and Shetland. The total population as of the 2011 census was 60,573.
The Arfon division of Caernarvonshire was a former UK Parliament constituency, which existed from 1885 until 1918. Before 1885 and after 1918 the area was part of the Caernarvonshire constituency. The Liberal MP William Rathbone represented the Arfon seat until 1895, followed by fellow Liberal William Jones. Upon the death of Mr Jones, Griffith C. Rees, for the Liberal Party, was elected unopposed at the subsequent by-election.
On 11 November 2022, the then current MP Hywel Williams announced his intention to stand down at the 2024 general election after more than 20 years as MP.
When first created in 1885, the constituency was defined as the Petty Sessional Divisions of Bangor, Conway and Nant-Conway, with the Parishes of Llanddeinilen and Llanberis (which were within the Carnarvon Petty Sessional Division). The constituency included the boroughs of Bangor and Conway which were part of the Carnarvon District of Boroughs constituency; only those who owned freehold land within the boroughs could vote in elections for the Arfon constituency as a second vote.
The new constituency was a merger of northern Caernarfon and western Conwy.
The electoral wards used to create the current constituency are entirely within the preserved county of Gwynedd; They are Arllechwedd, Bethel, Bontnewydd, Cadnant, Cwm-y-Glo, Deiniol, Deiniolen, Dewi, Garth, Gerlan, Glyder, Groeslon, Hendre, Hirael, Llanberis, Llanllyfni, Llanrug, Llanwnda, Marchog, Menai (Bangor), Menai (Caernarfon), Ogwen, Peblig, Penisarwaun, Pentir, Penygroes, Seiont, Talysarn, Tregarth and Mynydd Llandygai, Waunfawr and Y Felinheli.
Electoral history
The latest boundary change created a battleground in Arfon particularly for Labour, Plaid Cymru, and the Conservatives, with the latter being labelled as a 'resurgent' party by the Caernarfon Herald. The scale of contention had been reached due to the large shift in boundary changes which in turn created a need within each party to achieve a relatively unforeseen outcome. Plaid Cymru had previously never represented Bangor, which had been held by Conservative Wyn Roberts for twenty-seven years and a further thirteen under Labour's Betty Williams. It had however also been more than thirty years since Caernarfon had been represented by anyone other than Plaid Cymru.
In the event, Plaid gained the seat (which had been notionally Labour) in 2010 and held it in 2015; their victory in 2017 was by just 92 votes, the tightest margin in Wales in that election.
^ Craig, F. W. S. (1974). British parliamentary election results 1885-1918 (1 ed.). London and Basingstoke: The Macmillan Press Ltd. ISBN9780333169032. Page 469
Boundary of Arfon in Wales for the 2010 general election
