Although I’d been fortunate enough to work on previous productions narrated by Sir David Attenborough, the invitation to write the music for the story of his remarkable life was a particular honour, albeit a daunting one. To find the right musical tone for what Sir David refers to as his “witness statement”, a film that shows mankind’s impact on the natural world through the eyes of the man who has experienced so much and shared it with us all for so many years, was an exciting but nerve-racking prospect.