Journalists across the country have been invited to submit entries for the 2009 Paul Foot Award, now in its fifth year.
The award honours campaigning journalism in memory of investigative journalist and left-wing campaigner Paul Foot, who died in 2004.
The winner will be awarded £5,000, with five runners up each receiving £1,000 at a ceremony to be held in London in November.
Private Eye editor Ian Hislop and Guardian editor Alan Rusbridger are among the judges for the award, and both publications are sponsoring the event.
Individual journalists, teams of journalists or entire publications may enter and anything from single pieces to entire campaigns will be considered.
The organisers said submitted material must have been published in a newspaper, magazine or online between 1 September 2008 and 31 August 2009.
Last year the award was jointly awarded to Camilla Cavendish of The Times and Richard Brooks of Private Eye.
The closing date for entries is 1 September.