I think at a minimum (I say at a minimum because there are probably other musicians) SAULT is:

Cleo Sol (English Neo-Soul singer)
Inflo (English producer/multi-instrumentalist, worked on Little Simz' Grey Area and is probably producing her latest album as well)
Kid Sister (aka Melisa Young, who is American, from Chicago)

New album is great - favorites right now are "Bitter Sweet", "Fear" and "You From London"