While contributors have answered the "letter" of Saucepan's question as to what TASS means (and thanks very much too!), I think we were all hoping for more of a "spirited" answer - how does 640 hrs last year / 3 days TASS on this roster reflect current short haul crewing levels, and from looking at that (and a crystal ball, seaweed, runes or whatever you choose to gaze at) what can we divine about future crewing requirements?
I must admit to being baffled as to why BA would make you start your application from scratch again. You've proved yourself capable and willing to be an asset once, through what must be a costly process to administer, making people go through it again is only going to disenfranchise them, and cost BA time and money? Surely you would drain the pool before opening up any DEP again?