Keith Mansfield has been played on NTS over 50 times, featured on 53 episodes and was first played on 30 November 2013.

Keith Mansfield (born 1941) originally from Slough, United Kingdom, is a composer and arranger known for his creation of prominent television theme tunes, including the Grandstand theme for the BBC. Other works include "Light and Tuneful" (the opening theme for the BBC's coverage of the Wimbledon Tennis Championships), "World Champions" (the closing theme for NBC's coverage of the same tournament) and "World Series" (used for the BBC's athletics coverage).

Mansfield is probably best known by American audiences as the composer of the tune "Funky Fanfare", (sampled by Danger Mouse as mentioned below) used for underscoring in the Astro Daters series of snipes produced by the National Screen Service in the late 1960s. That song is currently used during the opening credits of the show Pit Boss on Animal Planet, as well as backing music for the "Quick Hits" segment on the Sklarbro Country podcast. The Astro Daters "Our Next Attraction" was featured prominently in two films by Quentin Tarantino, Kill Bill and Grindhouse. A vocal version of Funky Fanfare entitled "House of Jack" was also recorded by James Royal in 1969. Another Mansfield composition, "National Trust" was the opening theme to the movie Fist of Fear, Touch of Death, which utilizes Mansfield's library music score, and as the logo jingle for CBS/Fox Video.

In the 1960s and 1970s, Mansfield was a major figure in the UK library music scene and recorded a great deal of material for the production music company KPM. His work has been sampled by prominent hip-hop producers such as Danger Mouse ('Funky Fanfare' on the DANGERDOOM track 'Old School Rules' and on 'Run' by Gnarls Barkley, and 'Morning Broadway' on DANGERDOOM track 'Space Ho's'), Madlib and Fatboy Slim. American sports fans will find a lot of Mansfield's and other KPM composers' music used on NFL Films team highlights and Super Bowl documentaries.

Mansfield was arranger and conductor for several tracks on Dusty Springfield's 1968 UK album Dusty… Definitely and acted as orchestral arranger on some huge hits for The Love Affair (Everlasting Love) and The Marmalade (Reflections of My Life), among others.

He also produced some memorable work with Maynard Ferguson the jazz musician.