That Travel Weekly report does not align with the announcement on TUI's website I'm afraid.
TUI LAUNCHES BIGGEST EVER SUMMER PROGRAMME FOR SUMMER 2024 WITH 1.1 MILLION EXTRA FLIGHTS | TUI UK Media Centre
This reads "After over 60 years of presence at Luton, there will be 14 weekly flights to four countries with increased frequency to Dalaman and Antalya." No mention of additional.