This is the Backing Track without Bass from Platinum Part 2 Lesson.
“Platinum” is the fifth studio album by English multi-instrumentalist and songwriter Mike Oldfield, released on 23 November 1979 on Virgin Records. It was Oldfield’s first album to include shorter songs and music written by others. A modified version of the album was released in the United States and Canada and titled Airborn. The In Concert 1980 tour, which ran from April to December of that year, was in promotion of the album.
Sample Audio (38s):