Michael Berkeley 's guest this week is film-maker Tony Palmer , whose subjects have included Maria Callas. Richard Wagner. Benjamin Britten and most recently Sergei Rachmaninov. A piano prelude by Rachmaninov and a Purcell aria sung by Maria Callas feature among his choices today along with music by Britten, Shostakovich. Vaughan
Wiiitams, Phitip Glass and Bob Dylan. Executive producer Wendy Thompson Repeated tomorrow 6.30pm