Darlington Bank Top retains its tiled subway as the only means of access to the platforms from the Clock Tower entrance. The ramp and steps coming up to the platforms are surrounded by some fine railings and a lamp arch.
Durham has a pseudo-subway, which is essentially a raised, wooden, felt-covered platform running alongside the road access which tunnels under the platforms to give access from the up (city) side of the station to the down (Wharton Park) side.
With every passing passenger, the thing feels more and more likely to give way - although this webpage on an architect's website suggests that it may be about to get some 'mood' lighting to illuminate the collapse more fully, when it comes:
http://www.strzarch.co.uk/durham-station-underpass.html