On March 11 1969 (which was the day before Paul married Linda Eastman), two songs were worked on in order to present Apple artist Jackie Lomax with a second 45 single on the Apple label (the first one being "Sour Milk Sea" written by George Harrison and featuring the Beatles (minus John), Eric Clapton and Nicky Hopkin).
The two new songs consisted of a cover of the Coasters "Thumbin' A Ride" with the B side an original composition (by Jackie) entitled "Going Back to Liverpool".
On "Thumbin' A Ride", Paul plays drums and the song was produced at the Apple Studios on Savile Row. George was also present and contributed some guitar. The second side, "Going Back to Liverpool" also features Paul on bass and George on backing vocals and probably guitar as well. Both of these songs had been worked on this evening as well as probably other sessions around the same time frame.
Also, the single was not to be....it was eventually decided to release "Thumbin' A Ride" as a B side to the "New Day" Apple 45 single (in North America) and to the B side of "How The Web Was Woven" (in the UK).
"Going Back to Liverpool" was consigned to the vaults for the longest of time until finally released as bonus material for the re-issue of the "Is This What You Want" LP and CD re-issue by Apple circa 1991.