Mark Moore's electronic collective has a name that has appeared in many versions.
Originally it was S-Express on the debut "Theme From S-Express" single, copyright reasons led to an official change to S'Express, which has been further mangled on sleeves as S Xpress, S-Xpress, S'Xpress etc.
S'Express (pronounced ess-express; sometimes spelled S'Xpress or S-Express; otherwise known as Victim of the Ghetto) were a British dance music act from the late 1980s, who had one of the earliest commercial successes in the acid house genre.
"Theme from S'Express", based on Rose Royce's "Is It Love You're After", was also one of the earliest recordings to capitalize on a resurgence of sampling culture and went to number one in the United Kingdom as well as the Hot Dance Club Play chart in the United States (also scraping into the U.S. Billboard Hot 100 at #91).