The cornerstone of a Nielsen symphony cycle tend to be the accounts of the Fourth and Fifth, the latter perhaps the greatest symphony written in the 20th century. The accounts by the Royal Stockholm Philharmonic are beautifully played and recorded, though Gennady Rozhdestvensky’s tempi struck me as a touch broad in No 4, with lip-service only to the concluding accelerando. Energy is this music’s watchword and where this set fails is in Nos 1-3, where the expansive approach loses that very quality: the Third’s Allegro finale is simply turgid. More consistent sets abound – look instead to Vänskä (BIS), Berglund (RCA) or, best of all, Blomstedt (Decca).