There are three escalators between the concourse and bridge, the left-hand escalator is normally the one you need, whilst the direction of the middle escalator may be changed according to demand.
There are two upward and one downward escalator between the bridge and the Jubilee Line platforms. The north (up) escalator is beside (west of) the steps, whilst there's a pair of escalators beyond (south of) the lift. The left-hand escalator is normally the one you need.
WEST HAM STATION
© 2012, Terry Robinson