BRADDON
* By-election triggered by resignation of Labor's Justine Keay over her dual British citizenship.
* Held by Keay with a 2.2 per cent margin.
* Braddon is situated in northwestern Tasmania, with major centres including Devonport and Burnie.
* Keay is behind in the polls and betting markets, with former Liberal MP Brett Whiteley on track for a narrow win.
* Eight candidates have nominated.
* Bill Shorten and Malcolm Turnbull have campaigned heavily in the seat.
* Key issues: health, job creation, fishing.
