The British actresses have penned an open letter stressing the importance of funding for an independent watchdog to investigate complaints in industries spanning music, film, TV and theater.

British stars Keira Knightley, Cara Delevingne, Carey Mulligan, Rebecca Ferguson, Naomie Harris and Emerald Fennell have penned an open letter demanding a crackdown on bullying and sexual harassment in the U.K.’s entertainment industry.

The group are just six of 25 names who called on creative organizations to help fund a new watchdog, the Creative Industry Independent Standards Authority (CIISA), to investigate complaints in industries spanning music, film, TV and theater.

The letter reads: “So many of us in this industry would have loved to have an objective outside body that we could go to for advice, for mediation and in the very extreme circumstances, that we might need some outside body to hold people accountable for the bad behavior or bad practices that sometimes happen on our sets, on our stages, behind the scenes. And we are far from being alone in recognizing this need.”