Hundreds of British workers will be given greater choice over their hours as part of a new pilot by the official four-day week campaign.

The six-month project will build on the original 2022 trial, with employers also trying flexible start and finish times, a nine-day fortnight, and compressed hours.

The UK’s biggest union Unison and several big firms support the experiment, but other companies have abandoned the four-day week after trying it.

The campaign’s director Joe Ryle said "hundreds of British companies and one local council have already shown a four-day week with no loss of pay can be a win-win for workers and employers".

The campaign is backed by research from Cambridge University and Boston College, with Welsh community housing landlord Bron Afon Community Housing one of the first companies to sign up to the latest trial.

Meanwhile, some companies are trying another direction. Earlier this month, Greece introduced a six-day working week for certain industries in a bid to boost productivity and economic growth in turn.

It only applies to businesses which operate 24-hours a day and is optional for workers, who get paid an extra 40% for the overtime they do.

Mr Ryle will present the results of this second trial to the newly-elected Labour government next year.