David took part in the broadcast of Knocking on Heaven's Door. The performance was broadcast November 27, 1994 on Children's Radio BBC 4 at 6:00 pm with a runtime of 30 minutes. The producer was Alan Lambert.
The play was the prize-winning entry in the BBC's Education Writing for Radio competition. The winner was 15-year-old Inderjeet Lall. It was adapted for the radio by writer Michael Butt.
The challenge was to write an outline for a radio play featuring the rumble of thunder, the ring of a doorbell and a howling dog. The other readers were Richard O'Brien, David Antrobus, Lindsay Lerner, Robbie Gill, Don McCorkindale, Sam Kelly, Crawford Logan, and Amanda Simons.