The lanyard scheme, which is entirely voluntary, could be adopted across the country’s transport network, or other sectors, where passengers with hidden disabilities may benefit from additional support.
The Alzheimer’s Society, National Autistic Society and Action on Hearing Loss are backing the scheme.
Stewart Wingate, Gatwick’s chief executive, said: “Travelling through a busy airport can be a challenge for passengers with hidden disabilities and we want to ensure that we’re doing everything we can to welcome and assist all our passengers.”
The lanyards are available free of charge from Gatwick’s assistance desks.
Gatwick Airport is the UK’s second largest airport with flights to more than 200 destinations in 90 countries for more than 40 million passengers a year.