Richards, with help from Ken Moule and Leslie Osborne, wrote and sang many of the songs that were a regular and popular feature of the series, including "Memories Come Gently", "Velvet Blue", "I Bet You've Heard This One Before", "Good to Me", "All Our Yesterdays", "When We Can Live in Peace Once More" and "If This Is The Last Time I See You".
British easy listening and jazz pianist Ronnie Aldrich covered the song on his 1979 album, Tomorrow's Yesterdays.
Reingold played bass as special guest on the Musea/Colossus release: Dante's Inferno with a Hungarian progressive rock band called Yesterdays.
In his second album Welcome to My World, he collaborated with Alice Svensson, a childhood friend and Idol 2008 runner-up in the song "Save Our Yesterdays".
In 1975, he moved to Woburn, Bedfordshire and started a successful antiques renovation company known as Yesterdays Pine, specializing in antique and reproduction pine furniture and "correctabilia".