As is his custom, Sir Simon Rattle launches a new season with a celebration of British music—past, present, and future. Representing the past: Frank Bridge’s joyous Enter Spring and Edward Elgar’s epic Symphony No. 2, both replete with nature imagery. Representing the present and the future: Daniel Kidane’s Sun Poem, co-commissioned by the LSO and here receiving its London premiere. Now in his mid-30s, Kidane is the son of a Russian mother and Eritrean father; in 2019, the blowout closing night of the Proms opened with a piece of his called “Woke.” His style has been described as “propulsive” and “eclectic,” saturated with “influences of jungle, dubstep and R&B sampled from a trawl through the city after dark.” Henry Purcell, move over. —Matthew Gurewitsch