Cosmopolitan magazine is launching its F-Word campaign, a series of initiatives encouraging equality for women, to coincide with International Women’s Day tomorrow.

The campaign, which focuses on the predicted rise in the gender wage gap, is being backed by celebrities including Annie Lennox, Jameela Jamil, Emma Bunton and Professor Green, and calls for public, annual equal-pay audits in companies which employ over 250 staff. Readers can sign the Cosmopolitan Equal Pay petition online, to be presented to David Cameron later this year.