Celebrity will be among the largest river cruise brands by 2031 Sign up to Simon Calder’s free travel email for expert advice and money-saving discounts Get Simon Calder’s Travel email Get Simon Calder’s Travel email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Guests will have more chances to experience a sailing with Celebrity River Cruises after the brand revealed plans to double its fleet size by 2031. Celebrity