In succeeding years the Chorus performed and recorded works with further renowned conductors: Pierre Boulez, Lorin Maazel, George Szell, Daniel Barenboim and Rafael Frühbeck de Burgos (notable recordings of Mendelssohn’s Elijah, Orff’s Carmina Burana and Haydn's Die Schöpfung), Colin Davis (a memorable concert performance of Hector Berlioz's Les Troyens) and further collaborations with Walton, Benjamin Britten conducting his Spring Symphony, and a landmark performance, later released on LP and then CD, of Britten’s War Requiem conducted by Giulini, with Britten himself conducting the chamber ensemble.
These years saw the Chorus tour widely throughout Europe: several staged operas in the Roman Théâtre antique d’Orange, Haydn’s Die Schöpfung in Paris and London to mark the UK’s entry into the European Economic Community in 1973, Handel’s Judas Maccabaeus with Sir Charles Mackerras at the Teatro alla Scala Milan in 1980 followed ten years later by a second appearance at La Scala in Bach’s Mass in B minor under Giulini.
These years also saw the Chorus appearing regularly in the UK outside London with notable visits to Cardiff, Brighton, Nottingham, Derby, Cheltenham, Cambridge and Aldeburgh.
At London's Royal Festival Hall, its traditional home, the Chorus appeared regularly with Claus Peter Flor and Leonard Slatkin, both Principal Guest Conductors of the Philharmonia Orchestra.
In autumn 2002 the Chorus joined the orchestra and chorus of Norddeutscher Rundfunk and the BBC Singers in the presence of the President of Germany Johannes Rau and former Soviet leader Mikhail Gorbachev for a concert of reconciliation, Britten’s War Requiem conducted by Mstislav Rostropovich, performed in the Turbine Hall of the former Nazi rocket development factory in Peenemünde, north Germany.
In 2004, following a semi-staged concert performance of Weber’s Der Freischütz at the Edinburgh Festival the previous year, Sir Charles Mackerras agreed to become the Chorus’s first President, which post he held until his death in 2010.
The 50th anniversary was celebrated in June 2007 with a performance of Verdi’s Requiem with the Philharmonia Orchestra under Riccardo Muti in the presence of the Patron HRH The Prince of Wales.
In Autumn 2008 Edward Caswell became Artistic Director, training the Chorus for a performance of Bernstein’s Kaddish Symphony in London’s Barbican Centre conducted by John Axelrod in a concert to mark the 70th Anniversary of Kristallnacht.
The Chorus's appearances in almost every season at the “Easter at King’s” Festival founded by Sir Stephen Cleobury have included James MacMillan’s St John Passion of 2008 in the presence of the composer, Frank Martin’s Golgotha in the presence of the composer’s widow, and Herbert Howells’s Stabat Mater, all broadcast by BBC Radio from King’s College Chapel, Cambridge.
A performance in Hamburg of Elgar’s The Dream of Gerontius conducted by Sir Jeffrey Tate, a former member of the Chorus, led to his appointment as President, which position he held until his death in 2017.
The Chorus has continued to tour abroad, performing in Germany at the Rheingau Festival, and in Spain and France, with several appearances in Valencia with the Orquesta de Valencia conducted by Yaron Traub and in Lille with the Orchestre National de Lille including a cycle of Mahler Symphonies under Alexandre Bloch and Poulenc's late work Sept répons des ténèbres.
In an unusual combination, the full Philharmonia Chorus partnered the Academy of Ancient Music conducted by Laurence Cummings in a well-received performance at the 2023 BBC Proms of Handel's oratorio Samson.