The question remains: Who is whistling in Isles of Wonder?

[Spoomy]

My mistake. Yes, it does look like Karl was heavily involved in the lyrics.

Smith told how the brief for the piece was given: "Frank [(Cottrell-Boyce), the opening ceremony's writer] and Danny [(Boyle), its creative director] put forward beautiful, transcendental poems by people like WH Auden, Thomas Nash, Philip Larkin. They set the tone for Caliban's Dream. Very early on Danny encouraged me not to think in terms of "Eye of the Tiger" for the final stages; we weren't looking for anything testosterone-fuelled. Those poetic ideas that we had talked about initially just seemed so beautiful; we wanted to draw them in to the story of the torch. Karl [(Hyde), Smith's partner in Underworld] spent a long time working with those words to make them flow, helping avoid all the possible cliches we could fall prey to."[2]