The Enigma I Will Not Explain - Nimrod

Ruth Padel presents a series exploring the music of Elgar's Enigma Variations and analysing what the composition tells us about Elgar himself. The Variations depict 13 of Elgar's friends as well as the composer himself. One friend in particular inspired the well-known Nimrod Variation, but who was the figure behind the music and what part did he play in Elgar's career?