How many holds are available at Heathrow airport?

Heathrow Airport has a total of four designated holding patterns available for aircraft that may require them due to congestion or other operational needs. These holds are established to ensure safe and efficient traffic management in the busy airspace around the airport. Each holding pattern is designed to accommodate varying traffic conditions and to optimize the flow of arrivals and departures, helping to prevent delays and maintain safety. Understanding the number and function of these holds is crucial for air traffic controllers, as it allows them to manage incoming flights effectively, ensuring that aircraft can remain safely in the air until they can be cleared for landing or are provided with further instructions.