Hurghada is now showing on the Thomson website from LTN for the start of the winter timetable. Bourgas also seems to be a new destination from LTN for S06 but Kos has been dropped. Also slight increase in freq on some S06 flights compared to SO5.
First Choice brochure is showing a weekly SSH from 7 Nov & a weekly flight to Bulgaria starting 12 May 06. Both operated by FCA. I don't know if this has since changed.