Liverpool Street Station is in London's East End. The station serves commuters from Essex and the Anglia regions - some 72 million passengers each year*.
Eighteen platforms, most of which are capable of taking 12 car trains, squeeze through the station throat into six tracks as far as Bethnal Green, about a mile away. From there, four tracks diverge northwards towards Hackney Downs, Cambridge, and King's Lynn. Four more tracks continue eastwards towards Stratford, Shenfield, Southend Victoria, Colchester, and Norwich.
The nature of the layout means that there are no freight trains, except the odd postal service and maintenance trains, but there is very intensive passenger service. So much so during rush hour that a few minutes delay in certain locations can cause upto an hours worth of delays to following trains!
This simulation is a replica of the screens in use by the signallers at Liverpool Street IECC, covering the same area as the signaller controlling Liverpool Street. In fact, during rush hour, two signallers control this area, using identical screens. One controls platforms 1-12, the Suburban lines through Bethnal Green, and the four lines to Hackney Downs. The other signaller controls the rest.