Employment agencies across the country faced demonstrations today in memory of Simon Jones, who died while working at Shoreham docks.
The day of action is part of a campaign to improve working conditions for casual staff.
Mr Jones, 24, died four years ago today after an accident on his first day as a casual worker at the docks.
A memorial campaign has since been formed to warn of the health and safety dangers of casual labour.
Protests are being held in Brighton, London, Birmingham, Leicester, Sheffield, Oxford, Leeds, Liverpool and Bristol.
Campaigners planned to picket employment agencies, hand out leaflets and hold vigils.
A campaign spokesman said: "Throughout the country employment agencies make huge profits by providing cheap labour for companies who prefer employing casual labour to employing a well trained, decently paid workforce."
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