By Faha

The Northern Ireland Boundary Commission released their proposals for the new boundaries of the 18 Westminster constituencies. I will look at the proposals for each constituency and analyze how the changes would influence the results for both Westminster and Assembly elections.


Foyle and East Londonderry

A unionist section of the Slievekirk ward was transferred from West Tyrone to Foyle. The Eglington ward (~55% Catholic) was transferred from Foyle to East Londonderry. The overall demographic change would be neutral for Foyle and East Londonderry

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would be 0.5% more Catholic.
There would be no changes in the Westminster election. However, for an Assembly election in East Londonderry the loss of one of the unionist seats is more likely. The combined unionist vote in the 2019 Westminster election was 49.3%, slightly less than 3 quotas. Sinn Fein, Alliance and the SDLP all had a vote from 15.1% to 15.7% with 4.4% for Aontu. Decreasing the total unionist vote by 0.5% would make it more likely that Sinn Fein, Alliance and the SDLP would all win a seat with a net loss of one unionist.


West Tyrone
A unionist section of Slievekirk was transferred to Foyle. The new wards of Pomeroy and Donaghmore were transferred from Mid Ulster and Fermanagh South Tyrone to West Tyrone. Overall, the constituency is 1% more Catholic so any hope of regaining a 2nd unionist seat in an Assembly election is unlikely.


Fermanagh South Tyrone
There were major changes here. The Dungannon town wards were transferred to Mid Ulster and the unionist Killyman ward was transferred to Upper Bann. The old Loughgall, Ballymartrim and Charlemont wards were transferred from Newry and Armagh. The overall change is to increase the Catholic population less than 0.5%.
However, the changes in an election would be more pronounced. The Dungannon wards have a high percentage of Catholic EU nationals who do not vote in Westminster elections whereas there is a high turnout of nationalist voters in the wards added from Newry and Armagh. I estimate that the Sinn Fein vote would increase 1% to 2% in a Westminster election. The prospect of a unionist candidate regaining this seat in a Westminster election appear more remote with these changes.
Mid Ulster gains the Dungannon town wards and loses the Pomeroy ward and the new Donaghmore ward to West Tyrone. Overall, the constituency is 1% less Catholic. It would appear that there would be an increased chance for a 2nd unionist Assembly seat. However, in the 5 years between elections that 1% decrease will be erased by demographic changes.
Upper Bann gains the unionist Killyman ward from Fermanagh South Tyrone and loses the Loughbrickland ward to South Down. It also loses the Aghagallon ward (85% Catholic) and the Magherlin ward (25% Catholic) to Lagan Valley. Overall, it is 1.5% less Catholic. In a 2027 Assembly election that 1.5% decline will be erased by demographic changes over the 5 years between elections.


South Down and Strangford
These 2 constituencies have the greatest changes and much of it involves exchanges of wards between them.
Strangford gains the entire 5 wards of the Downpatrick DEA (only 7% unionist vote in 2019 Council election). It also gains part of the Catholic majority Crossgar ward. The Saintfield and Moneyreagh wards are transferred to Belfast South and the Kilmore and Ballynahinch wards are transferred to South Down. South Down also gains the Gransha ward from Lagan Valley.
The Catholic population to Strangford increases from 17% to 30%. Based on the 2019 Westminster results the total non unionist vote would equal or exceed 50%. This would result in the loss of 2 unionist seats in an Assembly election with the SDLP and Alliance each gaining one.
The Catholic population of South Down would decline 7.5%. Based on the 2019 Westminster results the total unionist vote would increase to 30%, short of 2 quotas. It is likely that the SDLP would lose a seat to Alliance.


North Antrim and East Antrim
The North Antrim wards of Glenravel, Glenwhirry and Slemish are transferred to East Antrim and North Antrim gains the old Glendun ward (93% Catholic). The 3 wards transferred to East Antrim are overall identical in demographics to the remainder of North Antrim. The addition of the Glendun ward to North Antrim increase the Catholic population of North Antrim by almost 1%. The net effect would be a loss of a unionist Assembly seat to Alliance based on the 2019 Westminster election.
South Antrim has only minor changes with the loss of some partial wards that are heavily unionist to East Antrim and the Catholic majority sections of Mallusk ward to North Belfast.
Lagan Valley loses the Gransha ward to South Down and gains the Aghagallon ward (85% Catholic) and Magherlin ward (25% Catholic). Overall, the Catholic population increases by 4%. This would solidify the SDLP seat here.


North Down
Only one minor change here with the addition of the Garnerville ward (similar to the old Belmont ward) from East Belfast.


North Belfast
The unionist Forth River ward was added and the unionist Woodvale and Shankill wards were transferred to West Belfast. The Catholic majority sections of Mallusk ward were added. Overall, the Catholic population increases by over 2%. This will have significant implications for the next Westminster election. When also accounting for demographic changes between 2019 and 2024 it appears that the total unionist vote could drop below 40%. The Sinn Fein vote could reach or exceed 50%. This constituency appears to be lost forever to unionism.


East Belfast
Garnerville ward was transferred to North Down and the Woodstock and old Wynchurch and Hillfoot wards were added from South Belfast. The constituency is 2% more Catholic. This will have significant implications for the Westminster and Assembly elections. Taking into account also any demographic changes over 5 years it appears that Alliance could narrowly win a Westminster election. The boundary changes alone would add 2% to the Alliance vote and subtract 2% from the unionist vote and Alliance only lost by 4% in 2019. There could also be a net loss of one unionist seat in an Assembly election.


South Belfast
The wards transferred to East Belfast are mentioned above. The Moneyreagh and Saintfield wards are added from Strangford and Drumbo from Lagan Valley. Overall, there is no demographic change and thus no expected changes in the election results.


West Belfast
Derryaghy South is added from Lagan Valley. Forth River is transferred to North Belfast and the new Shankill and Woodvale wards are added from North Belfast. The new constituency is 5% less Catholic. In an Assembly election this would increase the total unionist vote to 16%, just short of a quota of 16.6%.


These are the initial proposals. Anyone can submit comments and alternative proposals until mid-December. These changes do not appear to be major or controversial in most constituencies. The Boundary Commission must devise constituencies with an electorate between 69,724 and 77,062 voters. Because the Northern Ireland electorate is lower than the UK average per constituency the average per constituency is closer to 69,724.
I expect that the major objections will involve the Strangford and South Down constituencies. The 5 wards of the Downpatrick DEA within the current South Down will be transferred to Strangford. These could be transferred back to South Down and Ballynahinch, Kilmore, Saintfield, and Moneyreagh could be transferred back to Strangford. With any changes, Strangford will need to add one ward from the current South Down constituency (in addition to the part of Crossgar ward currently added to Strangford).
The electoral implications will be much clearer after the Assembly elections in May 2022. Also, the census results will be available in another year. Since the new wards do not align exactly with the old wards the census will provide more accurate demographic details when available.