For a youth orchestra as fine as this one, Vaughan Williams’ ‘London’ Symphony is a canny choice: written with such sturdiness and strength, it contains artistic immensities that must have made it a life-changing experience for these players. If its performance sometimes doesn’t quite have the weight of tone or flawless detail that’s expected from a professional orchestra, the differences are only marginal. Under Hughes, memorable things happen; the ‘London’ Symphony’s finale is here as powerful and moving as you’ll hear anywhere.