David Catlin-Birch is a British musician. He was a bassist for pop/alternative rock band World Party, and was the original Paul for the Beatles tribute band The Bootleg Beatles.
With Rowland Rivron and Richard Vranch, he made up the core team for Radio 2's musical comedy show Jammin' which won a Silver Sony Comedy Award in 2004. He played bass with The Flight of the Conchords on their 2005 Radio 2 series. In 2006 he joined Neil Innes and the Bonzo Dog Doo-Dah Band for their UK tour as lead guitarist, taking lead vocals for a handful of numbers and recording as a member of the band on their first album in 36 years, Pour l'Amour des Chiens.
As a session guitarist, bassist, vocalist, drummer and keyboardist, he has performed with Eurythmics, Stevie Wonder, Ringo Starr, Joe Cocker, and Robbie Williams. He also briefly wrote with the late Viv Stanshall from the Bonzo Dog Band.