The full list of nominations for the Hartlepool by-election has been revealed.
Mr Mandelson stepped down as an MP on 8 September
There are 14 candidates for the seat of former Cabinet minister Peter Mandelson, who has been appointed as Britain's new European Commissioner.
The election will be held on 30 September - the last day of Labour's conference.
The party is defending a 14,571 majority in the seat, which Mr Mandelson vacated earlier this month.
The candidates are: Edward Abrams (English Democrats); Stephen Allison (UK Independence Party); Philip Berriman (Independent); John Bloom (Respect); Ronnie Carroll (Independent); Jody Dunn (Liberal Democrat); Paul Watson (Fathers 4 Justice); Christopher Herriot (Socialist Labour Party); Alan Hope (Monster Raving Loony Party); Jeremy Middleton (Conservative); Richard Rodgers (The Common Good); Iris Ryder (Green Party); James Starkey (National Front) and Iain Wright (Labour).