Nick Utechin looks at Sherlock Holmes's incarnations on the radio from the 1940s onwards, including The Adventure of the Speckled Band (1945); The Red-Headed League (1954); The Boscombe Valley Mystery (1966); The Return of Sherlock Holmes: The Solitary Cyclist (1993); and The Further Adventures of Sherlock Holmes: The Abergavenny Murder (2004). Featuring an interview with writer and dramatist Bert Coules