More than 3,000 workers at 60 UK companies and organisations have signed up to the the four-day week in what is believed to be the world's biggest ever trial.
The pilot will run for six months beginning in June and is being organised by 4 Day Week Global in partnership with leading think tank Autonomy, the 4 Day Week UK Campaign, and researchers at Cambridge University, Oxford University and Boston College.
Participating organisations will trial a four-day week with no loss of pay for employees, based on the principle of the 100:80:100 model - 100% of the pay for 80% of the time, in exchange for a commitment to maintain at least 100% productivity.