Sieff has worked with many bands and artists including Wasted Youth, The Bad Plus, Herbie Hancock, Alexis Korner, Hugh Masekela, Big Country, Angelique Kidjo, Wynton Marsalis, Branford Marsalis, Denys Baptiste, Jazz Jamaica, Albert Collins, Keb' Mo', Spitting Image, Edoardo Bennato, Matumbi, Peter White and Clare Teal.
One memory of his youth was listening to a record by black pianist Jimmy Yancey during a German air raid.
Alexis de Tocqueville | Alexis Bledel | Alexis Korner | Alexis Ohanian | Alexis of Russia | Alexis Carrel | Alexis Boyer | Amy Korner | Alexis Taylor | Alexis Michaelides | Alexis Denisof | Alexis Creek | Willibald Alexis | Theodor Körner | Stephan Körner | Louis Alexis Desmichels | Alexis Vila | Alexis Tsipras | Alexis Stewart | Alexis Soyer | Alexis Soriano | Alexis Smith | Alexis Simon Belle | Alexis Rubalcaba | Alexis Pantchoulidzew | Alexis Minotis | Alexis Kochan | Alexis Josic | Alexis I. duPont High School | Alexis Georgoulis |
In addition, the original lineup of the band, with Nick Graham on bass guitar and vocals, recorded their first BBC session on Alexis Korner's World Service Rhythm & Blues show in December 1969.
He also performed with the Manhattan Sound Big Band, with Alexis Korner and various session musicians in the big band-rock fusion group CCS amongst others, and was a member of the Best of British Jazz group from the 1970s onwards.
Money joined Alexis Korner's Blues Incorporated for a short spell before rejoining the band, but fashions were drifting from straight RnB towards more experimental sounds and an emphasis on songwriting.
In 1960, Dobell started a short-lived spin-off label, Folklore, which released albums by Steve Benbow, Dominic Behan, Richard Fariña and Eric von Schmidt, and Cyril Davies and Alexis Korner, amongst others.