Musical borrowings, reworkings and reinventions run through this season’s Proms. The invisible thread linking tonight’s concert really begins with Bach. A lilting chaconne from his Cantata No. 150 underpins the finale of Brahms’s Symphony No. 4, and the latter’s elegant synthesis of heart and head is itself the inspiration for American composer Elizabeth Ogonek’s Cloudline, a lyrical homage to ancient musical forms and techniques. The chaconne’s repeating patterns are echoed elsewhere in the circling bass line of Purcell’s powerful Lament from Dido and Aeneas. Cellist Guy Johnston is the soloist in anniversary-composer Saint-Saëns’s Cello Concerto No .1.

The Scottish Chamber Orchestra and their young Principal Conductor Maxim Emelyanychev showcase Mozart’s final three symphonies – composed over a period of just two months in the summer of 1788.

Nicholas Collon and the Aurora Orchestra’s from-memory performances have become a thrilling recent fixture of the Proms. Now, following symphonies by Beethoven, Brahms, Shostakovich and Berlioz, they tackle their most audacious challenge yet: a complete performance of the colourful 1945 suite from Stravinsky’s ballet The Firebird. Russian fairy tales and folk melodies collide with Stravinsky’s bold musical modernism to create a memorable score. Radio 3 presenter Tom Service introduces the work from the stage, exploring its textures and themes and dismantling its intricate musical narrative with the help of Collon and his musicians. The concert opens with another Russian classic: Rachmaninov’s virtuosic Rhapsody on a Theme of Paganini, with former BBC Radio 3 New Generation Artist Pavel Kolesnikov as soloist.

The City of Birmingham Symphony Orchestra and Music Director Mirga Gražinyt?-Tyla champion the music of a too-long neglected composer. A pupil of Vaughan Williams, Ruth Gipps started her career as an oboist with what was then the City of Birmingham Orchestra in 1944, before becoming established as a composer. Her Symphony No. 2 takes a wide-screen, cinematic view of the Second World War, embracing exhilaration, anxiety and, finally, ecstatic rejoicing. Conflict of a very different kind runs through The Exterminating Angel Symphony by Thomas Adès (50 this year), inspired by Louis Buñuel’s Surrealist film.

Brahms’s Third Symphony strikes a more autumnal tone, inspired by a visit to the River Rhine in 1883. The critic Eduard Hanslick pronounced it ‘artistically the most nearly perfect’ of the composer’s symphonies to date.

Katie Derham presents from the Royal Albert Hall, as the opening concert of the 2021 Proms season continues in front of a live audience. Conductor Dalia Stasevska and the BBC Symphony Orchestra perform Sibelius’s thrilling Second Symphony. They are joined by soloists including soprano Elizabeth Llewellyn and tenor Allan Clayton for the world premiere of When Soft Voices Die, a poignant piece for our times by Scottish composer Sir James MacMillan.

Conductor Dalia Stasevska and the BBC Symphony Orchestra kick off a six-week season with Vaughan Williams’s ravishing Serenade to Music and Poulenc’s dazzling Organ Concerto. They’re joined by the BBC Singers and a cast of soloists, including soprano Elizabeth Llewellyn, tenor Allan Clayton and organist Daniel Hyde, for a celebration of the power of music to comfort and lift your spirits. Katie Derham presents from the Royal Albert Hall in London.

Featuring South African soprano Golda Schultz with the BBC Symphony Orchestra under its principal guest conductor Dalia Stasevska. Presented by Katie Derham.

Ryan Bancroft joins BBC NOW as principal conductor at BBC Hoddinott Hall in Cardiff Bay for his first official engagement, his Proms debut and the first Prom from Wales! Martinu’s quirky Jazz Suite complements John Adams’s Chamber Symphony, written in 1992. After the world premiere of a new BBC commission by British composer Gavin Higgins, there are two evocative American classics by Barber and Copland. Acclaimed soprano Natalya Romaniw from Swansea, who represented Wales in Cardiff Singer of the World, joins the orchestra for this unforgettable Prom.

Superstar siblings Sheku and Isata Kanneh-Mason perform their first Prom together, an evening of chamber music for cello and piano.

London based eight-piece band KOKOROKO bring their ‘horn fuelled’ Afrobeat sound to the Proms, led by trumpeter Sheila Maurice-Grey.