A new five-day rehearsal week is to be trialled across the subsidised and commercial theatre sector as part of new agreements secured by performers' union Equity.
A working party has been established between Society of London Theatres (SOLT)/UK Theatre and Equity to develop plans.
The trial will begin across six organisations in the subsidised sector: Northern Stage in Newcastle-upon-Tyne, Curve Theatre in Leicester, Hull Truck Theatre, Sheffield Theatres, Chichester Festival Theatre and the New Vic in Newcastle-under-Lyme.
The initial trial will finish by Christmas 2023, with Equity hoping to roll it out more widely afterwards.
Equity Industrial Official Charlotte Bence said the trial "will incorporate lots of different types of production – including children’s shows and pantomimes – so we can unpick what that way of working will look like across different scales of shows".
The five-day week is part of a raft of new agreements on pay and conditions brokered by Equity, that also includes the sector's first code of conduct for digs.
The quality of accommodation has become a big issue for theatre workers, with Equity members regularly reporting unsafe accommodation.
Equity general secretary Paul W Fleming said the negotiations had also delivered "strong percentage increases in minimum rates of pay, the payment of touring and subsistence allowance four weeks in advance, and good increases to swing and understudy payments".