Management is demanding major concessions from its musicians, who have been furloughed without pay since March.
The Apple family in Rhinebeck, New York, tries to carry on, as the world faces disaster and social upheaval.
The current production marks the first time that Gershwin’s masterpiece has appeared at the Met in almost 30 years.
Opera North staged a week of performances November 30-December 7 to commemorate the end of World War I. Included were two new commissions by the company and the British premier of Silent Night.
Rush, the target of unsubstantiated allegations by Sydney’s Daily Telegraph, will play Malvolio in Twelfth Night.