Thousands of workers are set to take part in a trial of a four-day working week today in the UK.

More than 3,000 employees at 70 companies across the country will begin the trial, with no loss of pay for those working a shorter week.

Organisers say it is the biggest four-day week pilot to take place anywhere in the world.

Firms taking part will give 100% of workers’ pay for 80% of the time, in exchange for a commitment to maintain at least 100% productivity.

The trial is being organised by 4 Day Week Global in partnership with think tank Autonomy, the 4 Day Week UK Campaign, and researchers at Cambridge University, Oxford University and Boston College.

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Companies taking part provide products and services ranging from education to workplace consultancy; banking; care; financial services; IT software training; professional development and legal training; housing; automotive supply services; online retail; sustainable homecare; skincare; animation studios; building and construction recruitment services; food and beverage and hospitality; digital marketing; and comprehensive case management services for people recovering from traumatic injury.

Researchers will work with each participating organisation to measure the impact on productivity and the wellbeing of its workers, as well as the impact on the environment and gender equality.

Joe O’Connor, chief executive of 4 Day Week Global, said: “The UK is at the crest of a wave of global momentum behind the four-day week.

“As we emerge from the pandemic, more and more companies are recognising that the new frontier for competition is quality of life, and that reduced-hour, output-focused working is the vehicle to give them a competitive edge.

“The impact of the ‘great resignation’ is now proving that workers from a diverse range of industries can produce better outcomes while working shorter and smarter.”

Juliet Schor, professor of sociology at Boston College, and lead researcher on the pilot, said: “We’ll be analysing how employees respond to having an extra day off, in terms of stress and burnout, job and life satisfaction, health, sleep, energy use, travel and many other aspects of life.

“The four-day week is generally considered to be a triple dividend policy – helping employees, companies, and the climate. Our research efforts will be digging into all of this.”