This shot is of the small bow wave from 370 passing over a large puddle in the track.
http://tdu.to/HPIM7721.JPG

This one is of the puddle itself.
http://tdu.to/HPIM7720.JPG

Other then a new platform building put in during c.2000 and the over head modified to pantograph operation in 1986, the infrastructure in the square hasn't been touched since the MTT built the terminus in 1966. You can tell because all the points have MMTB marked on them.

Regards, adelaide_h_class