William Lyall (1953-03-26)26 March 1953 Edinburgh, Scotland
1 December 1989(1989-12-01) (aged 36)
Billy Lyall (26 March 1953 – 1 December 1989) was a Scottish musician.
Born William Lyall in Edinburgh, Scotland, Lyall was a keyboard player, vocalist and occasional flautist with Pilot, and an early member of the Bay City Rollers. He was keyboard player for Dollar between 1978 & 1982, and also contributed to The Alan Parsons Project with fellow Pilot members. He left Pilot in early 1976 and released a solo album, Solo Casting later that year. Lyall died of AIDS-related causes in 1989, aged 36. Tam Paton later revealed that Lyall was gay.