On Tuesday there was a fault at Heathrow airport. This fault is technical. No planes can take off since 12:48 PM. The communication for the air traffic control is broken. The equipment does not work right. Experts work on a solution now.
Not only Heathrow has these problems. There was a stop at Gatwick airport too. Planes fly again in Gatwick now. But the fault takes longer in Heathrow. Airports in Manchester and Edinburgh notice the results too. There are many delays for the travelers.
Passengers must contact their airline. They must check the flight status. Everything is normal in the evening again. Planes can still land in Heathrow. Only taking off is forbidden for many planes. This brings much chaos to the terminals.