The new National Maternity Hospital planned for St. Vincents was one of the first topics discussed.
The proposed site of the new Hospital is to be on the edge of the Dublin Bay South Constituency.
Green Party candidate, Councillor Claire Byrne, Labour Party candidate Senator Ivana Bacik and Independent candidate Councillor Mannix Flynn join The Last Word to discuss the by-election campaign.
Catch the full chat by pressing the Play button on this page.