Thomson Cruises has revealed that its much-loved and longest serving ship Thomson Spirit will remain with the line for an additional year, until November 2018, to offer a series of summer 2018 sailings. The 1,254-passenger ship -- which was due to leave the fleet to rejoin Celestyal Cruises in November 2017 -- will offer five different seven-night Western Mediterranean itineraries out of Palma (April 2018) and Malaga (April - October 2018). Thomson is not offering winter 2017-2018 sailings onboard Thomson Spirit, revealing that it has only been granted a charter extension for the summer 2018 season. The ship will mark its final voyage as part of the Thomson fleet on October 21, 2018, with a Continental Coasts sailing in the Western Mediterranean.