Heathrow Airport is located about 22 km from central London. Heathrow is the biggest airport on the island and one of the top in passengers volume in the world. The busiest British airport is destined to deal with ever increasing traffic and the expansion of its operations. There is a tunnel between the terminals where the Heathrow Express runs now. In the 1960s moving walkways were used for first time in Terminal 3. At the end of the 1980s, during PM Thatcher’s cabinet, Heathrow Airport was privatized and today it is operated by BAA. The change in ownership brought about the creation of one more terminal – 4, located some 20 minutes by bus from the central part of the airport.