In step with the increasing demand for air transport, new terminal buildings were built. In 1962
Terminal 3 was opened, designed specifically for long haul flights. In 1968 Terminal 1 designed
for domestic airlines was opened. Terminal 4 was built in 1986 to the south of the southern
runway after a protracted inquiry, and all British Airways’ longhaul routes were moved into it from
Terminal 3. This broke out of the central area for the first time, despite the difficulties caused by
aircraft having to cross the southern runway and by passengers and bags having to be transferred
between Terminal 4 and the central area.