Boylan likely to be named as Sinn Féin candidate for by-election It's believed that no other candidate has put themselves forward ahead of Friday's convention when nominations for entries close Sinn Féin's Lynn Boylan with Mary Lou McDonald. Picture: Niall Carson/PA Wire Mon, 31 May, 2021 - 15:59 Daniel McConnell and Aoife Moore, Political Staff Senator Lynn Boylan is likely to be announced as the Sinn Féin candidate for the Dublin Bay South by-election this week. It is understood that no other candidate has put themselves forward ahead of the convention due to be held on Friday when nominations for entries close.