Ian McDonald
Giles and Ian McDonald both left King Crimson in December 1969, though Giles played on the band's second album, "In the Wake of Poseidon" as a session musician. He and Ian McDonald recorded an album called "McDonald and Giles", which was lighter in style than King Crimson, but still technically demanding. Giles then worked as a session player for the duration of the 1970s, appearing on albums by Anthony Phillips, Leo Sayer, and Kevin Ayers. He also played on Ian McDonald's 1999 solo album "Driver's Eyes".