Side two begins with "Horizons", a short guitar instrumental performed by Hackett that was recorded in the short time that Potter was the album's producer. It was written in the course of a year, and took musical inspiration from the Prelude of Suite No. 1 in G major, BWV 1007 for cello by Bach. He presented the piece to the group at a rehearsal on an electric guitar, though he had written it on a steel-string acoustic. Despite his nerves in playing it through, he initially thought the band would reject it. Hackett remembered Collins saying that there should be applause added to the end of the piece, and felt surprised when the band agreed to include it on the album. Hackett wrote it with English composers of the Tudor period in mind, including William Byrd, who often composed very short pieces, and a piece by Julian Bream. He pointed out the common mistake adopted by some listeners that "Horizons" was an opening to "Supper's Ready", but it did not bother him.