Logan Alstewart

Al Stewart as a sort of musical Logan Mountstuart? (From Wikipedia):

Stewart was a key figure in a fertile era in British music and he appears throughout the musical folklore of the age. He played at the first ever Glastonbury Festival in 1970, knew Yoko Ono before she met John Lennon, shared a London apartment with a young Paul Simon, and hosted at the legendary Les Cousins folk club in London in the 1960s.

Also:

Having bought his first guitar from future Police guitarist Andy Summers...