Went F late last year to Mia from T 3. Nightmare. Bad , bad checking. Y passengers were being checked in at the F desk ( fair enought to ease the que) but when I tried to get to the F desk line ( not push in the front but wait my turn) a BA agent was a quite rude in the way she questioned what I was doing.

When you get to the gat had to que half an hr for gate security. No fast track for F or J passengers. Then bus to the stand.

Would avoide this flight if at all possible.