This is the Backing Track without Main Guitar from Albatross Lesson.
Albatross” is a guitar-based instrumental by Fleetwood Mac, released as a single in November 1968, later featuring on the compilation albums The Pious Bird of Good Omen (UK) and English Rose (US). It was a major hit in several countries and became Fleetwood Mac’s only Number 1 hit in the UK Singles Chart, spending one week at the top. It was re-released in the UK as a single in 1973, and peaked at Number 2 in the charts. The piece was composed by Peter Green. The single has sold over 900,000 copies in the UK.