Further increase in traffic beyond the present 69 million passengers per year is limited by the capacity of terminal buildings and stands. Therefore the British Airports Authority brought forward plans for Terminal 5 in place of the Perry Oaks sewage farm, between the two main runways at the west end of the site. After the public inquiry, which began in 1994, it was expected that the government’s consent with the construction would be given in 1997. The first stage of the construction was supposed to last four years, giving a capacity of 10 millions of passengers per year (mppa) and a final capacity of 30 mppa.