We are flying into LGW (from USA) next Wednesday morning at 8:30 and have only 4 hours until our Flight leaves LHR for VIE. I have looked at the transport options and I'm still undecided since I'm not sure how long, or what check points I need to pass through, to get to the curb for pickup.

We are on BA, flying Business, have Global Entry (if that helps). When we exit plane how long should it take us to hit the curb for either bus or car transport? Then when we arrive at LHR whats the process to get into the boarding area? I would hope that by checking in on the first leg of the journey we don't need to do that again, but I don't know.

Any help you can give would be helpful. We will arrive at Gatwick South, and Fly out at LHR terminal 3.