Ellacott will leave the company at the end of June and is being replaced by Helen Caron who moves up to become director for distribution and cruise.
Ellacott has been at the company for 11 years occupying a variety of roles. He started as director of engineering for First Choice and then Thomson Airways and more recently served as managing director of Thomson Cruises.
Caron will be supported by the existing team and Chris Jones, who joins the business from Carphone Warehouse as director of customer operations.
Nick Longman, managing director of Tui UK and Ireland said: “It is with great sadness that we say goodbye to Fraser after 11 years with the business. His passion and energy has driven significant change and helped us build the successful business we are today and I’d like to take this opportunity to thank him and wish him well in his new role.
“I am also delighted that Helen Caron has been appointed as our director of distribution and cruise. Helen has strong experience in distribution from previous roles within Tui UK and Ireland and more recently has driven significant innovation and growth for our cruise business."