Tom Service talks to composer Max Richter about his latest project, ‘The New Four Seasons’, a new version of his critically acclaimed take on Vivaldi's piece, played this time on period instruments by Chineke! Orchestra and soloist Elena Urioste. Why period instruments and what new did he learn from the experience? We visit Welsh National Opera, in Cardiff, to see rehearsals for the epic production of Migrations, to open this month, exploring the good and bad of both humans’ and birds’ movements across centuries - from a slave in Bristol, to NHS doctors arriving from India, to the challenges refugees face today. Tom hears from composer Will Todd and some of the 6 librettists, among them Sir David Pountney, Eric Ngalle Charles, Shreya Sen-Handley and Miles Chambers. There’s news of a concert next month called ‘Looking Forward: the Orchestral Music of Afghanistan’, blending traditional folk instruments with Western instruments, featuring the Oxford Philharmonic and Afghan soloi...