No fast track for J at LGW as well, have to pay £10 to the airport (was £7 just a year back!). EK had started offering it to F passengers a few years ago but with F only one of the 3 daily flights, doesn't matter now. As it is, the walk from gate 110 to the immigration will want most passengers to sit down first rather than get into fast track. I use easyJet from LGW regularly and actually end up paying for fast track if my arrival is just after an EK flight.