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Heathrow Airport, originally called London Airport until 1966 and now known as London Heathrow
(IATA: LHR, ICAO: EGLL),

A major international airport in London, England. Heathrow is the second busiest airport in the world by international passenger traffic, as well as the busiest airport in Europe by passenger traffic, and the seventh busiest airport in the world by total passenger traffic. It is one of six international airports serving the London region.

Heathrow Airport is used by over 80 airlines flying to 185 destinations in 84 countries. The airport is the primary hub of British Airways and is a base for Virgin Atlantic. It has four passenger terminals (numbered 2 to 5) and a cargo terminal.

Aircraft destined for Heathrow are usually routed to one of four holding points.
Air traffic controllers at Heathrow Approach Control then guide the aircraft to their final approach, merging aircraft from the four holds into a single stream of traffic.