Curious optical illusions: Urban Railway Photos

Curious things happen in photographs from a moving train:

 The sloping livery of the commuter train and the far from vertical window panes give a great impression of speed, though there was only about ten miles an hour difference between the two trains. 

Here's another example:

Look how the posts supporting the overhead wires are leaning over when compared to the vertical lines of the empty gasometer.  The jumbled lines of a rail between the tracks adds to the unsettling effect.
Why?
Is it an effect of perspective?
I think it's to do with the speed of the digital camera phone which seems to begin to record the image from the top and by the time it reaches the bottom of the picture, the base of the post has come closer.  The traffic light between the posts is less affected because it's further away and the gasometer doesn't appear to be affected at all.

There's a subtle affect here on the trackside lights.  These photos were all taken trackside from GWR's Hereford to London Paddington train.

Strangely the train coming towards us leans to the left of vertical.
If someone can explain these weird optical illusions, I'd be grateful.