The Mail on Sunday journalist will join the magazine on Feb. 12.
The title is a new one and part of a sea of changes at the magazine over the past year.
Its conclusion was that the ad made the model look unhealthily thin and the image was “irresponsible.”
She is the latest longtime editor at Condé Nast Britain to give up her job.
The struggling title will become a biannual beauty publication.
She will succeed Stephen Quinn, who announced his retirement last week after serving in the role for 26 years.
Condé Nast U.K. has also responded to a spiky interview by Lucinda Chambers.
The new role reflects the company’s new multiplatform approach.
The women’s sector fell 5.6 percent overall — combining print and digital figures — in the July-to-December 2016 period.
The magazine’s ad volume was up 7 percent year-on-year.
The company has named Wolfgang Blau and Albert Read as president of Condé Nast International and managing director of Condé Nast Britain, respectively.
Albert Read is in the running to take over one of Nicholas Coleridge’s posts.