Following the Beatles' break-up in April 1970, Barham supplied the orchestral arrangements on Harrison's acclaimed triple album "All Things Must Pass" (1970). The album was co-produced by Spector, whose "distant and authoritarian" style Barham says he found difficult to adapt to after the "intimate, friendly atmosphere" typical of Harrison sessions. The songs to which Barham contributed include the international hits "My Sweet Lord" and "What Is Life", the album's title track, and "Isn't It a Pity". The last of these, Leng writes, "captures the depth of the musical understanding between George Harrison and John Barham", in the interplay between slide guitar, orchestra and choir.