A snapshot of the seat of Braddon

The seat of Braddon, in northwestern Tasmania, is one of five electorates facing a by-election on Saturday.

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.