Hundreds of construction workers will today gather outside the 2012 Olympic Park project in Stratford, east London, to protest the use of agency workers on the site.
The demonstration, driven by the GMB union, will also see calls for more jobs to be offered to workers in the local community.
GMB official Tom Kelly demanded all Olympic construction workers “should be employed on a PAYE basis”.
He said: “Direct employment on PAYE on agreed rates and conditions is the key that will open the door to the well-paid good jobs promised to the local community in east London.”
The protests are expected to attract many hundreds of workers from schemes such as the Lyndsey oil refinery in the north of England, where wildcat strikes were held in February over the use of foreign labour.
An Olympic Delivery Authority spokesman said: “We are committed to fair employment standards and positive industrial relations on the Olympic Park.
“There are high levels of direct employment on the site and an agreement with construction unions includes recognition of national working rule agreements, training and local employment.
“Local people are given priority in accessing training and jobs on site through local job brokerage services in the local area. The most recent figures showed that just under a quarter of the workforce had a permanent address around the Olympic Park and over half have a permanent address in London.”