Emily Sheffield will step down as editor of the Evening Standard after 15 months in the role.
Sheffield, the sister of Samantha Cameron, the wife of former prime minister David Cameron, and a former deputy editor of British Vogue, was announced as successor to George Osborne at the paper last June.
A statement from CEO Charles Yardley confirmed she was leaving the role with immediate effect “by mutual agreement”.
Sheffield will continue to write a column for the paper and publisher Charlotte Ross has been named acting editor.
It comes after a challenging period for the free newspaper as advertising and circulation were impacted by the coronavirus pandemic, resulting in the loss of about on in three jobs.
The company said it would focus on its “digital and mobile offering” as part of a restructure, while also developing a live events business.
The statement from Yardley said: ““We would like to thank Emily for her valuable contribution to the Evening Standard during this challenging time over the past 15 months and her role in turning the Evening Standard digital first.
“We wish her the very best with her future plans and look forward to her new column in the Evening Standard.”
Sheffield added: “I would like to thank the proprietor, the CEO and the wonderful staff at the Evening Standard for their support during my tenure as editor in this incredibly challenging period of history.
“Immense steps have been taken going digital first and I am excited for the Standard’s future and all we have achieved. I look forward to writing a column again.”
Osborne was announced as the paper’s editor-in-chief when Sheffield’s appointment was announced last year.