It will act as a discreet sign to staff that the wearer could require help or a little more time with things like finding their way around a centre or store and getting access to a quiet space or close-by toilet facilities, due to conditions such as autism, dementia or diabetes.
Demand for the initiative has soared since it was first introduced by Gatwick Airport, with more than 10,000 sunflower lanyards collected from there following its launch three years ago.