In 1972, The Beatles had been broken up for two years, but all four former members of the band were enjoying successful solo careers. George Harrison (All Things Must Pass) and John Lennon (Imagine) had already released platinum-selling albums; Ringo Starr’s would follow in ’73.
For his part, Paul McCartney tasted success as a solo artist right away with April 1970’s McCartney. After releasing Ram (1971) with his wife Linda, the couple formed Wings, which would would be Paul’s outlet for the rest of the ’70s.
Like the final Beatles releases, Wings albums went out on the Apple label, and Paul would occasionally use Abbey Road studios to record tracks. And that’s where he was in late ’72 while working on Red Rose Speedway.
Source: cheatsheet.com