tristar500 they may be listed, but are they bookable?
Just look at the thomsonflyflights web sites to see the mess an early release to SALE can have. Compare flights from thomsonfly to thomsonflights from the same airport!
At this stage of the game, brinkmanship occurs.
Traditionally, lo-co's wait until Dec/Jan to release flight for sale, to do so earlier reveals ones 'cards'!