Giles was elected President of the Royal Institute of British Architects in 1933. His distinguished secular works include Waterloo Bridge, Battersea Power Station, Bankside Power Station (now Tate Modern), and the iconic red telephone box.
In 1948, with Sir Giles immersed in his architectural work, he entrusted the leadership of Watts & Co. to his niece, Elizabeth Hoare. Together with her husband, Graham Hoare, she revitalised the company and championed the preservation of Victorian ecclesiastical embroidery at a time when interest had waned. Her sheer determination and passionate belief led to a remarkable renaissance for Watts & Co., culminating in the commission to create the vestments and furnishings for the 1953 coronation of Queen Elizabeth II. Elizabeth Hoare collaborated closely with leading architects—among them her uncle Giles, Stephen Dykes Bower, George Pace, and Keith Murray. By now settled in the new premises on Tufton Street in Westminster, they worked extensively with Westminster Abbey to produce copes for state and royal occasions.
In 1986, Watts was granted a Royal Warrant as ecclesiastical furnishers to HM The Queen. Around this time, Elizabeth founded the Elizabeth Hoare Gallery at Liverpool Cathedral, preserving a rich collection of Victorian embroidery and safeguarding the legacy of Watts’ early history.