The band confirmed that the tour will still go ahead without Brian:

We are deeply saddened that Brian, our lifelong friend and founding member of UB40, is unable to join us for our celebratory UK tour. We know he will be missed by all but his health and wellbeing come first, and we are sure our friends and fans will join us in wishing Brian a full and speedy return to health, and return to us.

Their latest album For the Many was released on 15 March and the tour begins on Friday 29 March in Portsmouth U.K.