The departure of Ali Campbell from UB40 isn't the 'happily leaving to pursure a solo career' that we had been lead to believe by the official statement.
Indeed, Campbell was surprised there was an official statement at all:
"The reason for me leaving the band is that management difficulties, which have been ongoing for almost five years, had become intolerable. I have been deeply unhappy with administrative practices and with many decisions that have been made in recent years, and I have an ongoing investigation into the handling of my business affairs in relation to UB40," he said.
This could, then, be the first time a band have split over administrative differences.