The only conventional gate line is en route to the London Overground and London Midland part of the station, platforms 8 to 11. The manual gate is to your right as you enter these platforms, though the automatic gate to your left is normally either open or operated by staff on request.
The gates en route to platforms 4 to 7 and 12 to 15 are believed to be under manual control, in so much as they're operated by staff. Note it is not obvious from the ramps which gates are open.
© 2010, Terry Robinson