There is, perhaps, little more disquieting than a pianist who twinkles. I refer to Lang Lang and the spangles on his suit. The programme for this concert - an all Tippett affair, with the Piano Concerto followed by A Child of Our Time -could hardly be described as festive, and one wonders if Lang felt he had to supply some glitter. "Dazzling" is a word often used to describe his starry virtuosity: in this case, however, the refraction off his outfit meant we had to take it literally.

Lang might not seem an obvious choice for Tippett's Concerto, though in fact it suits him rather well. A beautiful, overwrought, diffuse piece, it was written for Louis Kentner - who, like Lang, was a great Liszt interpreter - and the lyricism of the piano writing, particularly in the first two movements, frequently belies its difficulty. You couldn't help feeling that Lang treated it as a display piece, though he played the opening sections with fluid grace, before attacking the finale with thrillingly reckless panache. Colin Davis conducted the London Symphony Orchestra with great sensitivity: they took a while to settle into the work, however, and there were a couple of moments of imprecise ensemble and some tentative orchestral solos at the start.

A Child of Our Time, meanwhile, was phenomenally powerful. Triggered by the events of Kristallnacht, it was Tippett's first major score and its combination of immediate political invective and timeless spirituality remains unique and devastating. Davis conducted it with dogged intensity, drawing assured playing and singing from the LSO and its Chorus. Mihoko Fujimura's English was occasionally occluded in the alto arias, though you couldn't fault the other soloists: Indra Thomas, Steve Davislim and Matthew Rose. A very great work, greatly performed.