In 1942, when his second contract was reaching its expiry, he was offered 18 concerts for the 1943–44 season, and the Los Angeles Philharmonic invited him to become its conductor, but he accepted neither offer as he had decided to return to England.
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He appeared as a soloist with all the leading British orchestras, under conductors including Sir Colin Davis, Sir John Barbirolli, and Zubin Mehta.
Ferrier had gained a large following despite having performed for only 12 years as a professional singer, and had a number of influential champions including conductors Sir John Barbirolli, Bruno Walter and Sir Malcolm Sargent.
He had an international career, visited 40 countries, and played under conductors such as Sir John Barbirolli, Sir Adrian Boult, Sergiu Celibidache, Sergiu Comissiona, Antal Doráti, Josef Krips, Lorin Maazel, Harold Byrns, Yuval Zaliouk and Alfred Wallenstein.
He appeared at the Hollywood Bowl with conductors such as Sir John Barbirolli and Leopold Stokowski, and he played the sound track (Beethoven's Appassionata Sonata) for the Bette Davis 1946 film Deception.