Anna Clyne’s engaging First Person here led me to two of her works in a Philharmonia rainbow. She curated a woodwind-based gem of a 6pm programme of works by four women composers, herself included, and her Clarinet Concerto could only gain from two other live wires, soloist Martin Fröst and conductor Pekka Kuusisto, the first time I've encountered the violinist in that role. Ultimately it was his way with two masterpieces by Tchaikovsky and Bernstein that stole the show.

Collaboration fuels a lot of my music – I love the interaction that takes me outside of my natural tendencies – it’s a source of inspiration and an opportunity to see my own music and creative process through a different lens.

This longest, wackiest and most riskily diverse of Third Symphonies became Esa-Pekka Salonen’s personal property during his years as the Philharmonia's Principal Conductor. His successor, Santtu-Matias Rouvali, has (in)famously said he’s not interested in Mahler. Two of the orchestra’s most distinguished visitors, Jakub Hrůša and Paavo Järvi, certainly are, so after Hrůša’s blazing Second, hopes were high for Järvi’s Third.

Salome was not to get her head on a silver platter: Jennifer Davis, due to sing the bloody final scene of Strauss’s opera, had been experiencing abdominal pains during her first pregnancy – mother and child are fine – and had to withdraw at a late stage. Yet Jakub Hrůša, witness to her potential in the Royal Opera revival of Wagner’s Lohengrin which led to his appointment as Pappano’s successor there, took the Philharmonia all the way in a still-dazzling programme.

Sibelius and Mahler so often figure as the irreconcilable chalk and cheese of turn-of-the-century orchestral writing that it can be a salutary experience to hear them together on one bill.

After the long interval, as darkness falls, the screw turns in this Garsington revival more woundingly than any I can remember for Britten's most concentrated masterpiece. Evil chords, trills, cadenzas and silences from the 13 superb Philharmonia players conducted by Mark Wigglesworth duly terrorise; Verity Wingate as the Governess to two orphaned children in a house which seems haunted by their former elders really does seem possessed.

Boléro and Scheherazade may be popular Sunday afternoon fare, but both are masterpieces and need the most sophisticated handling. High hopes that the new principal conductor the Philharmonia players seem to love so much, Santtu-Matias Rouvali, would do Ravel and Rimsky-Korsakov justice were exceeded in a dream of a concert.

One benefit of the green tide in culture – music included – is that it should allow audiences to approach the arts inspired by the natural world in Britain, and elsewhere, a century ago with fresh ears and eyes. Weary over-familiarity can render a work such as Vaughan Williams’s The Lark Ascending virtually inaudible, just as much as neglect.

Two suns, two moons, two Philharmonia leaders sharing a front desk, two aspirational giants among Richard Strauss's symphonic poems bringing the number of players, in the second half, to 134. Who’d have thought we’d be witnessing such phenomena when, contrary to what the orchestra’s CEO claimed at the start and the unmasked half of a packed audience seemed to think, we haven’t even reached the “post-Covid era”.

To excel at one massive Brahms piano concerto in a standard concert hall is cause enough for celebration. To master two over one evening in a very unorthodox space – namely, below the roof of Peckham’s former multi-storey car park – brings the performer close to recreative genius.