You expect industrial wasteland. You get rolling green hills. Near Gatwick, you pass through the North Downs. It looks like a postcard.
Then you see the Gatwick control tower. It glows like a giant, white alien. Trains run right next to the runway. You can watch planes land while you chug along.
It’s like being in a movie. The movie is called "I’m Late For My Flight But I Don’t Care."
FlyerTalk Forums - Heathrow to Gatwick transport options: a pictorial guide
Why You Should Try It (Even if You Don’t Need To)
I dare you. Take this train just for fun. Go from LHR to LGW. Then immediately take a train back.
Why? Because it’s weird and fun. It’s a micro-adventure. You get to say you “transferred between London airports by rail.” It sounds so professional.
You can pretend you’re a secret agent on a mission. Your mission? Eat a KitKat and don’t spill on your shirt. Mission accomplished.