[Scythian]

It's the world's biggest trial of a four-day work week so far. Already, some workers have said they feel happier, healthier and are doing better in their jobs.

'Life changing'

Lisa Gilbert, a lending services manager at Charity Bank, an ethical loans provider in the south-west of England, describes her new routine as "phenomenal".

"I can really enjoy my weekend now because I've got my Friday for my chores and my other bits and pieces or ... if I just want to take my mum out for a walk I can do that now without feeling guilty," she told CNN Business.