Heathrow has begun a trial giving passengers the option to pre-book security slots ahead of their flights.
A free service, Heathrow Timeslot gives passengers a designated time and entry point to the security search area.
It is designed to help reduce queue times for all passengers by allowing colleagues to plan resources more effectively.
The trial will be live at Terminal 3 for up to six months and initially be open to passengers travelling with American Airlines, Delta, Emirates and Virgin Atlantic. Further airlines may be added during the trial.
The outcomes of the trial will inform any future extension or roll-out to other terminals at the airport.
Mark Powell, Operational Planning Director at Heathrow, said: “This new trial will give passengers that extra added bit of certainty and reassurance ahead of their journey.
“We look forward to seeing the data come in to give us some learnings on how we can roll this out more widely across Heathrow.”