Ynys Môn (Senedd constituency)

Not to be confused with Ynys Môn (UK Parliament constituency).

Ynys Môn is a constituency of the Senedd. It elects one Member of the Senedd by the first past the post method of election. Ynys Môn is also one of nine constituencies in the North Wales electoral region, which elects four additional members, in addition to nine constituency members, to produce a degree of proportional representation for the region as a whole.

Ynys Môn
Senedd county constituency for the Senedd
Ynys Môn shown within the North Wales electoral region and the region shown within Wales
Current Senedd county constituency
Created	1999
Party	Plaid Cymru
MS	Rhun ap Iorwerth
Preserved county	Gwynedd

It was represented from 1999 by Ieuan Wyn Jones, the former leader of Plaid Cymru. Jones resigned from the Assembly on 20 June 2013, triggering a by-election, which was held on 1 August 2013.^[1] Plaid Cymru's candidate Rhun ap Iorwerth comfortably held the seat for the party with a majority of over 9000 votes.^[2]

Boundaries

Map of current boundaries

The constituency was created for the first election to the Assembly, in 1999, with the name and boundaries of the Ynys Môn Westminster constituency. It is entirely within the preserved county of Gwynedd.

As created in 1999, the North Wales region includes the constituencies of Alyn and Deeside, Caernarfon, Clwyd West, Clwyd South, Conwy, Delyn, Vale of Clwyd, Wrexham and Ynys Môn. From the 2007 Assembly election the region included Aberconwy, Alyn and Deeside, Arfon, Clwyd South, Clwyd West, Delyn, Vale of Clwyd, Wrexham and Ynys Môn.

Voting

In elections for the Senedd, each voter has two votes. The first vote may be used to vote for a candidate to become the Assembly Member for the voter's constituency, elected by the first past the post system. The second vote may be used to vote for a regional closed party list of candidates. Additional member seats are allocated from the lists by the d'Hondt method, with constituency results being taken into account in the allocation.

Assembly Members and Members of the Senedd

Election		Member	Party
	1999	Ieuan Wyn Jones	Plaid Cymru
	2013 by-election	Rhun ap Iorwerth

Elections

Elections in the 2020s

2021 Senedd election: Ynys Môn^[3]

Party		Candidate	Constituency			Regional
			Votes	%	±%	Votes	%	±%
	Plaid Cymru	Rhun ap Iorwerth[a]	15,506	55.9	+1.1	11,892	42.7	―1.3
	Conservative	Lyn Hudson	5,689	20.5	+9.0	6,199	22.3	+8.6
	Labour	Sam Egelstaff	5,300	19.1	+2.1	6,546	23.5	+5.1
	Reform UK	Emmett Jenner	692	2.5	New	352	1.26	New
	Liberal Democrats	Christopher Jones	547	2.0	+0.7	478	1.7	―0.6
	Abolish					739	2.7	―1.6
	Green					734	2.6	+0.3
	UKIP					371	1.3	―12.4
	Gwlad					202	0.7	New
	Freedom Alliance (UK)					122	0.4	New
	Communist					77	0.3	±0.0
	Propel					50	0.2	New
	TUSC					14	0.1	New
	Independent	Michelle Brown				13	0.1	New
Majority			10,206	35.4	―2.4
Turnout			27,734
	Plaid Cymru hold		Swing
Notes Incumbent member for this constituency

Elections in the 2010s

Welsh Assembly Election 2016: Ynys Môn

Party		Candidate	Constituency[4]			Regional[5]
			Votes	%	±%	Votes	%	±%
	Plaid Cymru	Rhun ap Iorwerth	13,788	54.8	+13.4	11,015	44.0	+8.2
	Labour	Julia Dobson	4,278	17.0	―9.2	4,598	18.4	―4.7
	UKIP	Simon Wall	3,212	12.8	N/A	3,417	13.7	+7.8
	Conservative	Clay Theakston	2,904	11.5	―17.7	3,430	13.7	―10.7
	Green	Gerry Wolff	389	1.5	New	577	2.3	+0.3
	Liberal Democrats	Thomas Crofts	334	1.3	―1.9	578	2.3	±0.0
	Independent	Daniel ap Eifion Jones	262	1.0	New
	Abolish					1,066	4.3	New
	Monster Raving Loony					146	0.6	New
	Association of Welsh Independents					94	0.4	New
	Communist					63	0.3	+0.1
	Mark Young - Independent					48	0.2	New
Majority			9,510	37.8	+25.6
Turnout			25,167	50.0	+1.4
	Plaid Cymru hold		Swing

By-election 2013: Ynys Môn

Party		Candidate	Votes	%	±%
	Plaid Cymru	Rhun ap Iorwerth	12,601	58.24	+16.8
	Labour	Tal Michael	3,435	15.88	―10.3
	UKIP	Nathan Gill	3,099	14.3	New
	Conservative	Neil Fairlamb	1,843	8.5	―20.7
	Socialist Labour	Kathrine Jones	348	1.6	New
	Liberal Democrats	Stephen Churchman	309	1.4	―1.8
Majority			9,166	42.3	+30.1
Turnout			21,635	42.4	―6.2
	Plaid Cymru hold		Swing	+13.58

Welsh Assembly Election 2011: Ynys Môn^[6]

Party		Candidate	Constituency			Regional[7]
			Votes	%	±%	Votes	%	±%
	Plaid Cymru	Ieuan Wyn Jones	9,969	41.4	+1.7	8,620	35.8	―6.2
	Conservative	Paul Williams	7,032	29.2	+16.2	5,875	24.4	+3.3
	Labour	Joe Lock	6,307	26.2	+8.8	5,552	23.1	+3.5
	Liberal Democrats	Rhys Taylor	759	3.2	―0.2	554	2.3	―0.4
	UKIP					1,431	5.9	+1.3
	Green					481	2.0	―2.6
	Socialist Labour					732	3.0	+2.1
	BNP					539	2.2	―1.3
	Weyman - Independent					105	0.4	New
	Welsh Christian					104	0.4	―0.2
	Communist					59	0.2	―0.1
Majority			2,937	12.2	―4.2
Turnout			24,067	48.6	―3.2
	Plaid Cymru hold		Swing	―7.3

Regional ballots rejected at the count: 144^[8]

Elections in the 2000s

Welsh Assembly Election 2007: Ynys Môn

Party		Candidate	Constituency[9]			Regional[10]
			Votes	%	±%	Votes	%	±%
	Plaid Cymru	Ieuan Wyn Jones	10,653	39.7	+2.3	11,167	42.0	+7.1
	Independent	Peter Rogers	6,261	23.3	New
	Labour	Jonathan Austin	4,681	17.4	―6.4	5,212	19.6	―5.6
	Conservative	James Roach	3,480	13.0	―15.5	5,612	21.1	―2.9
	Liberal Democrats	Mandi Abrahams	912	3.4	-4.8	723	2.7	―6.8
	UKIP	Francis Wykes	833	3.1	+2.2	1,221	4.6	+2.1
	Green					1,217	4.6	+2.6
	BNP					934	3.5	New
	Socialist Labour					234	0.9	New
	Welsh Christian					148	0.6	New
	Communist					77	0.3	New
	CPA					50	0.2	New
Majority			4,392	16.4	+6.5
Turnout			26,820	51.8	+1.5
	Plaid Cymru hold		Swing

Welsh Assembly Election 2003: Ynys Môn

Party		Candidate	Constituency			Regional[11]
			Votes	%	±%	Votes	%	±%
	Plaid Cymru	Ieuan Wyn Jones	9,452	37.4	―15.2	8,765	34.9	―12.1
	Conservative	Peter Rogers	7,197	28.5	+9.3	6,025	24.0	+5.0
	Labour	William Gerwyn Jones	6,024	23.8	+0.9	6,342	25.2	―0.4
	Liberal Democrats	Nicholas Bennett	2,089	8.2	+3.0	2,381	9.5	+3.7
	UKIP	Francis Charles Wykes	481	1.9	New	616	2.5	New
	Green					509	2.0	Unknown
	John Marek Independent Party					219	0.9	New
	Cymru Annibynnol					171	0.7	New
	Communist					58	0.2	Unknown
	ProLife Alliance					33	0.1	New
Majority			2,255	8.9	―20.8
Turnout			25,243	50.3	―9.3
	Plaid Cymru hold		Swing

2003 Electorate: 49,998
Regional ballots rejected: 239

Elections in the 1990s

Welsh Assembly Election 1999: Ynys Môn^[12]

Party		Candidate	Constituency			Regional
			Votes	%	±%	Votes	%	±%
	Plaid Cymru	Ieuan Wyn Jones	16,469	52.6	N/A	14,664	47.0	N/A
	Labour	Albert Owen	7,181	22.9	N/A	7,982	25.6	N/A
	Conservative	Peter Rogers	6,031	19.2	N/A	5,930	19.0	N/A
	Liberal Democrats	James Clarke	1,630	5.2	N/A	1,816	5.8	N/A
	Green					Unknown	Unknown	N/A
	Rhuddlan Debt Protest Campaign					Unknown	Unknown	N/A
	United Socialist					Unknown	Unknown	N/A
	Communist					Unknown	Unknown	N/A
	Natural Law					Unknown	Unknown	N/A
	Above list parties					784	2.5	N/A
Majority			9,288	29.7
Turnout			31,311	59.6
	Plaid Cymru win (new seat)

See also

• North Wales (Senedd electoral region)
• Senedd constituencies and electoral regions