'Those who have tried it on with Max have had a tendency to find themselves lying on their backs, wondering where the blood is coming from': a timely warning from Mike Seabrook's 60th-birthday biography of Sir Peter Maxwell Davies . . . The Docklands Sinfonietta has renamed itself Sinfonia 21. Why? . . . Robert Ponsonby, ousted by John Drummond as director of the Proms, has complained that his successor's 1994 retrospective series includes revived premieres from almost all the past 100 seasons bar the 12 years of his own directorship . . .