Bridge Street changes to Park Street in the middle of the bridge. See this image https://commons.wikimedia.org/wiki/File:Colnbrook_Bridge_-_geograph.org.uk_-_88250.jpg of the north parapet of the bridge.

Here be Coal Tax plaque and Coal tax post bot "ancient monuments". See http://rhaworth.net/cowi/cowitin.php?f=spelthor