No, you can’t. If you try to visit this London airport using Transport for London’s Oyster or Contactless payments, you’ll find a line of ticket inspectors waiting to fine you – and everyone else who makes the same mistake – £20.
Plus you’ll get charged a maximum fare on Oyster or Contactless for not ending your journey.
And that’s despite the Gatwick website saying that both have been valid since 2014.
So, watch out. It’s a nasty setup.