Around 2,600 employees from 100 companies, including Atom Bank and marketing firm Awin, will switch to a four-day work week.
Supporters of the four-day work week argue it increases productivity and happiness among employees while also improving firms’ ability to attract and retain workers.
They also claim that the five-day pattern is a relic of a previous economic era.
Adam Ross, Awin’s chief executive, said adopting the four-day week was “one of the most transformative initiatives we’ve seen in the history of the company.
“Over the course of the last year and a half, we have not only seen a tremendous increase in employee wellness and well-being but concurrently, our customer service and relations, as well as talent relations and retention also have benefited.”
The 4 Day Week Campaign group is coordinating the UK’s largest pilot for approximately 70 companies employing approximately 3,300 people.
READ MORE: CALIFORNIA IS TRYING TO INTRODUCE A FOUR-DAY WORK WEEK – HERE’S ALL YOU NEED TO KNOW
In September, 88 percent of the companies polled in the middle of the trial said the four-day week was working “well” for their business.
Approximately 95 percent of the companies polled reported that productivity had either remained constant or improved since the introduction.
15 percent of firms polled reported a significant increase in productivity.
However, some businesses previously stated that they struggled with rota confusion.
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Samantha Losey, boss of communications firm Unity, told The Telegraph last month: “It’s more likely that we won’t carry on now. One of the things that have struck me is whether or not we are a mature enough business to be able to handle the four-day week.
“The rest of the world not doing four-day weeks makes it challenging. We agreed we’d go all the way through the pilot, but I’m questioning whether this is the right thing for us long-term. It’s been bumpy for sure.”
A trial in France formerly found workers were putting in the same number of hours of actual work, even with a day less each week.