Heathrow is in the London Borough of Hillingdon, west of Central London, England, Heathrow has two parallel main runways running east-west and five terminals. The site covers 12.14 square kilometres (4.69 square miles). Terminal 5 was officially opened by Queen Elizabeth II on 14 March 2008 and opened to passengers on 27 March 2008. Terminal 2 opened in 2014, and Terminals 3 and 4 will be refurbished during this period. In November 2007 a consultation process began for the building of a new third runway.