I have seen some skew bridges in my time but this one almost defies photography. The two views below might show what I mean.
This is looking more or less axially through the bridge and shows the semi-circular arch with a 20ft span (this WAS the canal era).
The end view of the acute corner of the abutment below gives another emphatic illustration of the skew. Ballard had considerable trouble geting the centring out and transferring stress. There are bulges evident that probably date from that time, though the cracks he describes seem to have been repaired effectively.