Ynys Mon clearly one of the seats to watchin next Election.

The news that Labour's Albert Owen has announced he is to stand down at the next general election makes it one of the Key Seats  at the next election

The MP for Ynys Mon said personal reasons were behind his decision and would stay until the next scheduled poll in 2022.

However he added that if an snap election, as has been predicted as Brexit remains deadlocked, then he would not be able to continue for a further five years..

Although a Plaid target seat  for a number of elections Mr Owen has managed to hold the seat after wining it from Plaid in 2001 and could well have  done so again.

Though now it is three way marginal with Plaid because of the shock election call perhaps not being prepared and selecting ex MP and AM  Ieuab Wyn Jones .

General election 2017: Ynys Môn^[17]

Party		Candidate	Votes	%	±
	Labour	Albert Owen	15,643	41.9	+10.7
	Conservative	Tomos Davies	10,384	27.8	+6.6
	Plaid Cymru	Ieuan Wyn Jones	10,237	27.4	−3.1
	UKIP	James Turner	624	1.7	−13.0
	Liberal Democrat	Sarah Jackson	479	1.3	−0.9
Majority			5,259	14.1	+13.4
Turnout			37,367	70.6	0.7
Registered electors			52,921
	Labour hold		Swing	+2.1

General election 2015: Ynys Môn^[18][19][20]

Party		Candidate	Votes	%	±
	Labour	Albert Owen	10,871	31.1	−2.2
	Plaid Cymru	John Rowlands	10,642	30.5	+4.3
	Conservative	Michelle Willis	7,393	21.2	−1.3
	UKIP	Nathan Gill	5,121	14.7	+11.2
	Liberal Democrat	Mark Rosenthal	751	2.2	−5.4
	Socialist Labour	Liz Screen	148	0.4	N/A
Majority			229	0.7	−6.4
Turnout			34,926	69.9	+1.1
Registered electors			49,939
	Labour hold		Swing	−3.2

This is because voters on the Island do not like changing their  sitting MP rather than the party he or she represents.

Since the  Second World War despite often being marginal it has only seen the Island change colour tfour  times 

Cledwyn Hughes  actually beat the sitting MP  Lady Megan Lloyd George in 1951 and hels it untill  his retirement in 1979

General election 1951: Anglesey

Party		Candidate	Votes	%	±
	Labour	Cledwyn Hughes	11,814	40.1	+0.1
	Liberal	Megan Lloyd George	11,219	38.2	−8.5
	Conservative	O Meurig Roberts	6,366	21.7	+8.4
Majority			595	1.9	N/A
Turnout			29,399	81.4	−1.3
Registered electors			36,117
	Labour gain from Liberal		Swing

Lady Megan  returned  then ironically won a byelection for Labour in Carmarthen in 1997.

Cledwyn however built up a comfortable majority over the years and when he retired in 1979 it was expected that Elystan  Morgan who was once a leading light for Plaid and on his defection  won Ceredigion For Labour ( in 1966 losing it to the liberals in 1974) would win .

However in the Tory Landslide of 1979 it was won by aKeith Best was born in Brighton,  for the Conservatives.

General election 1979: Anglesey

Party		Candidate	Votes	%	±
	Conservative	Keith Best	15,100	39.0	+15.2
	Labour	Elystan Morgan	12,283	31.7	−9.9
	Plaid Cymru	John L Williams	7,863	20.3	+1.2
	Liberal	John Gwynedd Jones	3,500	9.0	−6.5
Majority			2,817	7.3	N/A
Turnout			38,746	81.2	+5.1
Registered electors			47,726
	Conservative gain from Labour		Swing	+12.5

Best who learned Welsh  resigned his seat in 1987 following the revelation by the Labour Research Department that he had made multiple share applications in the BT offer (for which he was later convicted and  was sentenced to four months' imprisonment for this deception and was fined £3,000. On 5 October 1987, the Court of Appeal ruled that his jail sentence was too harsh, and Best was released but his fine was increased to £4,500.

However there was no Byelection as the General Election was called .

In the previous election Plaid has moved up to second place and it was Ieuan Wyn Jones who won .

General election 1987: Ynys Môn^[29][30]

Party		Candidate	Votes	%	±
	Plaid Cymru	Ieuan Wyn Jones	18,580	43.2	+9.9
	Conservative	Roger Evans	14,282	33.2	−4.3
	Labour	Colin Parry	7,252	16.9	±0.0
	Social Democratic	Ieuan Wilson Evans	2,863	6.7	−5.6
Majority			4,298	10.0	N/A
Turnout			42,977	81.7	+2.1
Registered electors			52,633
	Plaid Cymru gain from Conservative		Swing	+7.2

He held the seat in subsequent elections  and it became a contest largely between Plaid and Labour . However when Ieuan stood down after switching to the new Welsh Assembly, the Plaid Candidate  was unable to hold it

ral election 2001: Ynys Môn^[24]

Party		Candidate	Votes	%	±
	Labour	Albert Owen	11,906	35.0	+1.8
	Plaid Cymru	Eilian Williams	11,106	32.6	−6.8
	Conservative	Albie Fox	7,653	22.5	+1.0
	Liberal Democrat	Nicholas Bennett	2,772	8.1	+4.3
	UKIP	Francis Wykes	359	1.1	N/A
	Independent	Nona Donald	222	0.7	N/A
Majority			800	2.4	N/A
Turnout			34,018	63.7	−11.2
Registered electors			53,398
	Labour gain from Plaid Cymru		Swing	+4.3

Plaid of course  comfortably hold the Assembly seat  with  Rhun ap Iorwerth and despite a strong Tory presence , must consider the next election will be their best chance to turn it green.

It would always have been a target seat, hopefully  there is a candidate of the calibre of  Rhun ap Iorwerth , but may not have much time yo do so.