If Anna Wintour asked me to attend her couture fittings after this book, I will be surprised

The British global editorial director of Vogue, 74, issued an apology ahead of the event for a 'confusing' dress code - but she may not have expected some of the interpretations.

In this extract from his explosive new memoir, the former editor-at-large of US Vogue talks frankly about its legendary editor-in-chief