Garsington Opera is an annual summer opera festival founded in 1989 by Leonard Ingrams. The Philharmonia Orchestra and The English Concert are its two resident orchestras. For 21 years it was held in the gardens of Ingrams's home at Garsington Manor in Oxfordshire. Since 2011 the festival is held in Wormsley Park, the home of the Getty family near Stokenchurch in Buckinghamshire, England. After Ingrams's death in 2005 Anthony Whitworth-Jones became its General Director until 2013 when Douglas Boyd became artistic director.

The Philharmonia Orchestra is a British orchestra based in London. It was founded in 1945 by Walter Legge, a classical music record producer for EMI. Among the conductors who worked with the orchestra in its early years were Richard Strauss, Wilhelm Furtwängler and Arturo Toscanini; of the Philharmonia's younger conductors, the most important to its development was Herbert von Karajan who, though never formally chief conductor, was closely associated with the orchestra in the late 1940s and early 1950s. The Philharmonia became widely regarded as the finest of London's five symphony orchestras in its first two decades.