This bridge, about half way along the platforms, connects platform 4 to platforms 1 - 3. The steps from platform 3 are beside the east corner of the concourse, whilst those on platform 4 are just northeast of the entrance/exit gates.
There's tactile paving at the foot of the steps on each platform, the major flights of steps are divided by a central rail and there's a hand rail to each side. We presume you're supposed to keep left.
From platform 3, you go up 12 then seven steps, going northeast. Turn right (southeast), go up two steps going southeast. There's a glass wall to each side, continue down two steps, going southeast. Turn right (southwest), go down seven then 13 steps, going southwest, onto platform 4.
© 2010, Terry Robinson