The Duchess of Edinburgh looked effortlessly chic as she debuted a new autumn outfit for an event in London on Thursday.

Duchess Sophie presented designer Steven Stokey-Daley – who has been backed by singer Harry Styles – the prestigious Queen Elizabeth II Award for British Design at the British Fashion Council Awards.

The founder and creative director of fashion brand SS Daley received the annual award, which recognises innovation and work that engages with sustainable practices or the…