One to watch: Could Alliance top first preference poll?

Profile: This is a genuine yo-yo constituency with the Westminster seat in British general elections flipping between the DUP and Ulster Unionists several times since the turn of the century.

When it comes to the Assembly poll, the view is any change to the current line up would be a major surprise.

Despite being a staunchly unionist constituency, Sinn Féin's Declan Kearney, one of two junior ministers at Stormont, topped the poll for individual first preferences in 2017.

The DUP has traditionally secured more than 30% of the vote in this constituency in Assembly elections so its two incumbent MLAs are not expected to have any problems.

Former Ulster Unionist Party leader Steve Aiken is also seeking re-election. A former British Royal Navy submarine commander, it would be a major surprise and blow for his party if he was to be sunk.

Much attention will focus on the performance of incumbent Alliance Party MLA John Blair. He got 12.5% of first preferences in the last Assembly poll, but the party share grew to more than 19% in the British General Election two years later.

Many observers are surprised the party has not fielded a running mate in the hope of making a gain, but the view is that it wants to consolidate with an eye on future Assembly and local council elections.

The Traditional Unionist Voice is fielding a former DUP member, Mel Lucas, who left the party over its decision to enter power-sharing with Sinn Féin.

The party will hope its strong anti protocol stance will attract votes away from the larger, mainstream unionist parties, but it would take a huge swing in first preferences and transfers for it to secure a seat.

The SDLP has long targeted a seat in South Antrim, but has fallen short.

Its candidate Roisin Lynch took 9.5% of the first preferences last time around and she will hope to add to that, but she would need strong transfers from Alliance and Sinn Féin to be in the race.

2017 result: 1 SF, 1 UUP, 1 Alliance, 2 DUP

2017 First preference share:
DUP 33.7%
UUP 20.8%
Sinn Fein 16.3%
Alliance 12.5%
SDLP 9.5%

Seats Available: 5

Number of candidates: 12

Candidates

Steve Aiken, UUP

Roisin Bennett, Aontú

John Blair, Alliance Party

Pam Cameron, DUP

Trevor Clarke, DUP

Declan Kearney, Sinn Féin

Mel Lucas, TUV

Roisin Lynch, SDLP

Jerry Maguire, People Before Profit Alliance

Paul Michael, UUP

Andrew Moran, Independent

Lesley Veronica, Green Party (NI)