Ooooh, this is new. They must've released this service recently. I might give this a try on our way back from summer hols. Anyone tried it out yet?
Believe it or not, they do. Currently £5.40 though and can be bought through MyGatwick as well. ;)
Wish they'd have something similar for getting out of Gatwick Airport - the security process coming back through passport control in Gatwick is painfully slow - we have 2 young kids so can't use our biometric passports via the e-gates, so end up queuing at least half hour to get through passport control. I'd definitely pay to go through there quickly
Heathrow I'm afraid!
Last few times I travelled through Gatwick, they seem to have got their act together and the whole security process was actually pretty quick. £1 is very cheap though!