The editor of fashion magazine Harper's Bazaar has told ITV News of L'Wren Scott's "great talent for friendship".
Justine Picardie said as well as being "an inspiration to many in the fashion industry", Scott was "a very dear friend to a number of people, myself included".
More top news
The Duke and Duchess of Cambridge met young people who have battled mental health issues on Saturday.
Former Chancellor Lord Geoffrey Howe was Margaret Thatcher's longest-serving Cabinet minister, also taking on the role of Foreign Secretary.
Lord Geoffrey Howe is known by many for his resignation speech which was seen as the catalyst which destroyed Margaret Thatcher.