The Royal Philharmonic Orchestra was born in 1946 out of Sir Thomas Beecham's refusal to accept that British orchestral life had to be conservative. That founding instinct — the willingness to be chameleonlike, to play film soundtracks and rock anthems alongside the canonical repertoire — is either the RPO's distinguishing characteristic or its identity crisis, depending on your sympathies. An 80th-birthday concert at the Royal Festival Hall had to answer that question. The programmers' solution was elegant: every work on the bill was chosen not for prestige but for what it risked at the moment of its premiere. Errollyn Wallen's Flare, a two-minute world premiere, opened the evening with three whooping trumpets and a full-orchestra wallop before erupting into barefaced horns and effervescent strings. It was a joyride and knew it — precisely the right temperature-setter for a night about creative nerve. Beethoven's Triple Concerto of 1804 was the first concerto ever to feature an entire piano trio as concertante soloist. Vasily Petrenko, the latest music director in a line that includes Rudolf Kempe and André Previn, played obliging accompanist to cellist Pablo Ferrández and violinist Julia Fischer, whose performances landed as poetic, almost flirtatious. Pianist Jan Lisiecki, placed awkwardly with his back to the string duo, found moments to swivel and cajole them into a lyrical threesome. The scrupulously balanced trio still pulled virtuosic rabbits out of Beethoven's musical hat across the collegiate C major sunshine. Richard Strauss's Ein Heldenleben of 1899 was, at the time of its premiere, the composer's most colossally orchestrated score. Petrenko gave it a determined start — the RPO strings chugging, woodwind limber, brass rock-solid across nine horns. The Hero's Companion, Strauss's portrait of his tempestuous wife, was handled with self-effacing virtuosity by leader Duncan Riddell. What distinguished this performance was not the individual moments but the through-line: vision and musical cohesion held the rip-roaring orchestral battle, the laser-focused offstage brass, and the final retreat from the world with its soulful strings into a single, coherent argument. The night's implicit thesis — that the RPO's identity has always been its willingness to leap — was confirmed rather than merely asserted. Wallen's Flare didn't feel like a tokenistic premiere sandwiched before the real business; it set the terms. Petrenko and the orchestra emerged, as the reviewer noted, as the real heroes of the evening. That's a satisfying reversal: a birthday concert that ended up being less about looking back than about demonstrating what eighty years of institutional nerve looks like when it's still firing.