Concluding the week of programmes in which Brian Morton talks to James MacMillan about his life, music and inspirations, including most of the new music he has written in the last 18 months. The programme features MacMillan's epic Vigil symphony, which invited comparisons with Mahler when it was first performed last October. Performed by the BBC Scottish Symphony Orchestra, conducted by Osmo Vanska , it is a work with spiritual origins - intimately associated with Easter and the Resurrection. Repeated from last Friday