I am not familiar with Fast track at T5. At Gatwick North Terminal Fast track is a waste of time. As the way the entrance area is set up it captures most people entering security from the many check zones to the left. As BAA staff never check entitlement it’s often faster to use a non-Fast track lane. They don’t check entitlement for the non-Fast track lanes either. Also it used to be the case that the Fast track lane was only open until 3pm. A nice extra money earner for BAA, without providing the service. I hope the new owners of Gatwick, who ever they are going to be, put this right.