https://airwaysmag.com/airports/london-southend-airport/
https://simpleflying.com/ryanair-close-london-southend-base/
In 2021, Ryanair only plans to operate 278,775 seats from the airport, after which it will shut down operations. Currently, Wizz Air only has 9,720 seats scheduled for 2021. However, the absence of both easyJet and Ryanair could also make room for Wizz Air to substantially grow its operations at Southend.