# Islwyn (Senedd constituency)

Islwyn (Welsh pronunciation:) is a constituency of the Senedd. It elects one Member of the Senedd by the first past the post method of election. Also, however, it is one of eight constituencies in the South Wales East electoral region, which elects four additional members, in addition to eight constituency members, to produce a degree of proportional representation for the region as a whole.

## Boundaries

The constituency was created for the first election to the Assembly, in 1999, with the name and boundaries of the Islwyn Westminster constituency.
The other seven constituencies of the South Wales East electoral region are Blaenau Gwent, Caerphilly, Merthyr Tydfil and Rhymney, Monmouth, Newport East, Newport West and Torfaen.

## Voting

In general elections for the Senedd, each voter has two votes. The first vote may be used to vote for a candidate to become the Member of the Senedd 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 | Brian Hancock | Plaid Cymru |
| 2003 | Irene James | Labour |
| 2011 | Gwyn R Price | Labour |
| 2016 | Rhianon Passmore | Labour |

## Results
### Elections in the 2020s

2021 Senedd election: Islwyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour Co-op | Rhianon Passmore | 9,962 | 40.7 | -4.3 | 10,845 | 46.1 | +1.6 |
| | Independent | Kevin Etheridge | 4,723 | 19.3 | New | N/A | N/A | N/A |
| | Plaid Cymru | Rhys Mills | 3,930 | 16.1 | -3.4 | 4,072 | 17.3 | +0.6 |
| | Conservative | Gavin Chambers | 3,894 | 15.9 | +7.9 | 4,837 | 20.6 | +12.3 |
| | Abolish | Michael Ford | 568 | 2.3 | New | 1,190 | 5.1 | +1.3 |
| | UKIP | Neil Hamilton | 507 | 2.1 | -20.1 | 621 | 2.6 | -18.4 |
| | Liberal Democrats | Oliver Townsend | 476 | 1.9 | -0.8 | 572 | 2.4 | +0.1 |
| | Gwlad | Gwlad | Gwlad | Gwlad | Gwlad | 462 | 2.0 | New |
| | Reform UK | James Wells | 421 | 1.7 | New | 452 | 1.9 | New |
| | No More Lockdowns | No More Lockdowns | No More Lockdowns | No More Lockdowns | No More Lockdowns | 194 | 0.8 | New |
| | Propel | Propel | Propel | Propel | Propel | 113 | 0.5 | New |
| | Communist | Communist | Communist | Communist | Communist | 87 | 0.4 | +0.2 |
| | TUSC | TUSC | TUSC | TUSC | TUSC | 55 | 0.2 | -0.2 |
| Majority | Majority | Majority | 5,239 | 21.4 | −1.4 |
| Turnout | Turnout | Turnout | 24,613 | 42.48 | +1.7 |
| | Labour hold | Labour hold | Swing | | |
| Notes ↑ Incumbent member for this constituency |||||||||
Regional Ballot void votes: 198. Want of an Official Mark (0), Voting for more than ONE party or individual candidate (57), Writing or mark by which the Voter could be identified (0), Unmarked or Void for uncertainty (141)

### Elections in the 2010s

Welsh Assembly Election 2016: Islwyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Rhianon Passmore | 10,050 | 45.0 | −12.9 | 9,935 | 44.5 | -7.1 |
| | UKIP | Joe Smyth | 4,944 | 22.2 | New | 4,683 | 21.0 | +15.7 |
| | Plaid Cymru | Lyn Ackerman | 4,349 | 19.5 | −2.2 | 3,740 | 16.7 | -0.7 |
| | Conservative | Paul Williams | 1,775 | 8.0 | −3.9 | 1,853 | 8.3 | -2.0 |
| | Liberal Democrats | Matthew Kidner | 597 | 2.7 | −0.4 | 512 | 2.3 | -0.8 |
| | Green | Katy Beddoe | 594 | 2.7 | New | 449 | 2.0 | -0.1 |
| | Abolish | Abolish | Abolish | Abolish | Abolish | 844 | 3.8 | New |
| | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | Monster Raving Loony | 126 | 0.6 | New |
| | TUSC | TUSC | TUSC | TUSC | TUSC | 98 | 0.4 | New |
| | National Front | National Front | National Front | National Front | National Front | 51 | 0.2 | New |
| | Communist | Communist | Communist | Communist | Communist | 46 | 0.2 | -0.1 |
| Majority | Majority | Majority | 5,106 | 22.8 | −13.4 |
| Turnout | Turnout | Turnout | 22,309 | 40.8 | +2.5 |
| | Labour hold | Labour hold | Swing | | |
Welsh Assembly Election 2011: Islwyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Gwyn R Price | 12,116 | 57.9 | +20.2 | 10,804 | 51.6 | |
| | Plaid Cymru | Steffan Lewis | 4,527 | 21.7 | +0.1 | 3,640 | 17.4 | |
| | Conservative | David Chipp | 2,497 | 11.9 | +4.3 | 2,161 | 10.3 | |
| | BNP | Peter Whalley | 1,115 | 5.3 | New | 944 | 4.5 | |
| | Liberal Democrats | Tom Sullivan | 653 | 3.1 | −1.7 | 657 | 3.1 | |
| | UKIP | UKIP | UKIP | UKIP | UKIP | 1,102 | 5.3 | |
| | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | 680 | 3.2 | |
| | Green | Green | Green | Green | Green | 444 | 2.1 | |
| | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | Welsh Christian | 355 | 1.7 | |
| | English Democrat | English Democrat | English Democrat | English Democrat | English Democrat | 87 | 0.4 | New |
| | Communist | Communist | Communist | Communist | Communist | 63 | 0.3 | |
| Majority | Majority | Majority | 7,589 | 36.2 | +26.8 |
| Turnout | Turnout | Turnout | 20,908 | 38.3 | −4.7 |
| | Labour hold | Labour hold | Swing | +10.1 | |
Regional ballots rejected at the count: 134

### Elections in the 2000s

Welsh Assembly Election 2007: Islwyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Irene James | 8,883 | 37.7 | −18.2 | 9,925 | 42.3 | -11.0 |
| | Independent | Kevin Etheridge | 6,665 | 28.3 | New |
| | Plaid Cymru | Alan Pritchard | 5,084 | 21.6 | +2.7 | 5,049 | 21.5 | +4.3 |
| | Conservative | Paul Williams | 1,797 | 7.6 | −1.5 | 2,283 | 9.7 | -1.5 |
| | Liberal Democrats | Mark Maguire | 1,135 | 4.8 | −1.3 | 1,482 | 6.3 | -1.6 |
| | UKIP | UKIP | UKIP | UKIP | UKIP | 1,221 | 5.2 | +3.2 |
| | BNP | BNP | BNP | BNP | BNP | 1,213 | 5.2 | +3.5 |
| | Green | Green | Green | Green | Green | 629 | 2.7 | -0.5 |
| | Independent - Colin Hobbs | Independent - Colin Hobbs | Independent - Colin Hobbs | Independent - Colin Hobbs | Independent - Colin Hobbs | 612 | 2.6 | New |
| | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | 428 | 1.8 | -0.8 |
| | Welsh Christian Party | Welsh Christian Party | Welsh Christian Party | Welsh Christian Party | Welsh Christian Party | 375 | 1.6 | New |
| | English Democrat | English Democrat | English Democrat | English Democrat | English Democrat | 108 | 0.5 | New |
| | CPA | CPA | CPA | CPA | CPA | 76 | 0.3 | New |
| | Communist | Communist | Communist | Communist | Communist | 70 | 0.3 | New |
| Majority | Majority | Majority | 2,218 | 9.4 | −26.3 |
| Turnout | Turnout | Turnout | 23,564 | 43.0 | +3.6 |
| | Labour hold | Labour hold | Swing | +23.3 | |
Welsh Assembly Election 2003: Islwyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Labour | Irene James | 11,246 | 55.2 | +15.8 | 10,874 | 53.3 | +10.7 |
| | Plaid Cymru | Brian Hancock | 3,926 | 19.3 | −22.7 | 3,516 | 17.2 | -25.4 |
| | Tinker Against the Assembly | Paul Taylor | 2,201 | 10.8 | New |
| | Conservative | Terri-Anne Matthews | 1,848 | 9.1 | +2.3 | 2,283 | 11.2 | +4.3 |
| | Liberal Democrats | Huw Price | 1,268 | 6.2 | −3.6 | 1,607 | 7.9 | -1.7 |
| | Green | Green | Green | Green | Green | 656 | 3.2 | Unknown |
| | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | Socialist Labour | 524 | 2.6 | Unknown |
| | UKIP | UKIP | UKIP | UKIP | UKIP | 415 | 2.0 | New |
| | BNP | BNP | BNP | BNP | BNP | 337 | 1.7 | New |
| | Cymru Annibynnol | Cymru Annibynnol | Cymru Annibynnol | Cymru Annibynnol | Cymru Annibynnol | 144 | 0.7 | New |
| | ProLife Alliance | ProLife Alliance | ProLife Alliance | ProLife Alliance | ProLife Alliance | 50 | 0.2 | New |
| Majority | Majority | Majority | 7,320 | 35.9 | N/A |
| Turnout | Turnout | Turnout | 20,489 | 39.6 | −7.7 |
| | Labour gain from Plaid Cymru | Labour gain from Plaid Cymru | Swing | +19.4 | |
2003 Electorate: 51,170 Regional ballots rejected: 316

### Elections in the 1990s

Welsh Assembly Election 1999: Islwyn :
| Party | Party | Candidate | Constituency | Constituency | Constituency | Regional | Regional | Regional |
| Party | Party | Candidate | Votes | % | ±% | Votes | % | ±% |
| | Plaid Cymru | Brian Hancock | 10,042 | 42.0 | N/A | 10,209 | 42.6 | N/A |
| | Labour | Shane Williams | 9,438 | 39.4 | N/A | 8,604 | 35.9 | N/A |
| | Liberal Democrats | Caroline J. Bennett | 2,351 | 9.8 | N/A | 2,299 | 9.6 | N/A |
| | Conservative | Chris Stevens | 1,621 | 6.8 | N/A | 1,640 | 6.9 | N/A |
| | Socialist Alliance | Ian Thomas | 475 | 2.0 | N/A | 100 | 0.4 | N/A |
| | Others | Others | Others | Others | Others | 1,085 | 4.5 | N/A |
| Majority | Majority | Majority | 604 | 2.6 | N/A |
| Turnout | Turnout | Turnout | 23,927 | 42.48 | N/A |
| | Plaid Cymru win (new seat) | Plaid Cymru win (new seat) | Plaid Cymru win (new seat) | Plaid Cymru win (new seat) | Plaid Cymru win (new seat) |