TUI Crete Here We Go: TUI and Greece to Set “Strategic” Partnership 6 years ago Tourism Μinister Haris Theocharis will announce a special agreement with the largest travel organizer in the world, TUI Group. UK Family Outraged Over TUI Downgrade on Crete 7 years ago UK travelers to Crete are outraged at TUI for room-description muck-ups and downgrades.