I assume because G-TAWW isn't one of the ones wearing the Sunwing livery.
Regarding the charters, I was very surprised at the use of Privilege Style from BHX given that some TUI aircraft were sitting idle but either of the matters above could possibly explain that.
D-ATUO (TUI Germany 738) flew HAJ*-ABZ-TFS-ABZ-*HER-HAJ (*ferry) over the past couple of days which was rather odd as two ferry flights were still needed but, again, could be due to the above.