The model hit out at a photo of British Vogue's editorial staff which does not include any non-white employees.
The 67-year-old has edited the fashion bible for almost 30 years and was editor of British Vogue in the Eighties.
Edward Enninful will replace Alexandra Shulman at the helm of the influential fashion bible on August 1.
The Prime Minister brushes off negative 'Trousergate' comments made after she wore a £995 pair of leather trousers in her latest interview.
Victoria Beckham has penned a revealing open letter to her teenage self, laying bare the insecurities she felt growing up.
Vogue editor-in-chief Anna Wintour is apparently among the candidates being considered by President Barack Obama to become the next American ambassador to the UK or France.
Sources told Bloomberg the London-born 63-year-old, one of Obama's biggest fundraisers, could benefit from the president's desire to reward those who helped him gain re-election.
A spokeswoman for Vogue, though, denied Ms Wintour, who is now a US citizen, was interested in a diplomatic post.