London Heathrow Airport is the busiest airport in the UK and the third busiest airport in the world by total passenger traffic. Not to worry though as all the services you need to make your arrival stress free are at hand. There are clear signs directing you to passport control, baggage reclaim and customs and then through to local transport links, other terminals and the airport car parks. Heathrow opened in 1930s by Fairey Aviation, a British aircraft manufacturer and was primarily used for testing during its first years of operation. The airport was named after the hamlet Heath Row.