What happens when youth and maturity meet? The expressive sound of cellist Senja Rummukainen, tipped for worldwide success; the Lahti Symphony Orchestra debut of conductor Jonathon Heyward, whose career is taking off sensationally; The Imagined Forest by Grace-Evangeline Mason (b. 1994), the colour, form and imagination of which have been acclaimed both in England and in the Nordic countries. Dmitri Shostakovich’s First Symphony, composed when he was a student, contains all the trademarks of the mature composer. Esa-Pekka Salonen’s Cello Concerto takes listeners into outer space, to a comet’s journey.