There is escalator only access between the Central Line platforms and the concourses.
there are three escalators between the Underground concourse and the platforms, you'd normally use the left-hand one. In fact, there's a rail separating the entrance and exit areas of the space before the top of these escalators.
There are two sets of three escalators between the platforms and the north concourse, you'd normally use the right-hand escalator of either set.
LIVERPOOL STREET UNDERGROUND STATION
© 2008, Terry Robinson