“It’s the Caribbean heritage mixed with American influence,” says Omar, who’s been described as the father of British neo-soul music, “and then it’s the Cockney.” This is what gives U.K. soul its Union Jack character, setting its beats off from those across the pond. Uniting three of Britain’s most soulful with beloved U.S. funk-disco group, Kool & the Gang, this one-day festival celebrates the U.K.’s world-wide contribution to soul. —C.J.F.