Weren't there seven runways ?
2 x 09/27, 2 x 05/23 and 3 x 14/32.
Yes but not all at once.
According to my Ian Allen London's Airports which was published about 1959
The RAF built 3 runways, an inverted triangle. A second triangle was imposed on top of this and during this work the original 32L was decommissioned and a new 32L built. The original 32L passed through what is now the T2 car park. By 1959 32R was not in use leaving 5 runways.
At this time the only passenger building in the central area was called the Short Haul Building, or the Nbr 2 passenger building (now T2). The new long haul building was under construction and was to be called the Long haul building or the Nbr 3 passenger building.
The Queens Building was never a Terminal, although there were two jetties leading to four gates on its airside, pax walked there from T2. There were three more jetties leading to six ground level gates on T2.
I used to cycle to LAP in 1963, cycling through the tunnel to the Central Area. Cycling was later banned, and a special bus was put on which carried bikes in racks at the back from the Northside area.