Just for interests sake, at BHX there is no real fast track channel, however check-in staff normally give J passengers, a classy laminated bit of paper that allows you to walk past (what quickly becomes) a very disgruntled queue and then push in at the end... I actually found it quite embarassing compared to a seperate dedicated channel!!

Also I think DXB-PER does not have lie-flat seats, have done this route twice in the last two months and both times got the cradle seats, hopefully it has changed !!!