The location of this post is shown in
TQ1091 : Potter Street Hill,
TQ1091 : Potter Street Hill (2) and
TQ1091 : Potter Street Hill / South View Road.
This post is Grade II listed - it's so good, it's listed twice (at slightly different grid references):
Link and
Link . The listings have photos of the post (in 1999 and 2004) when all of the City of London crest was painted red, and all of the correction plate was painted black.
There were originally nearly 280 coal tax posts located around London, of which about 210 are still extant; around 180 of these (85%) are 3 ft high white-painted square bollards with a pyramidal top, decorative raised bands, and the shield from the City of London’s arms, like this one. Photos of the coal tax posts on Geograph are at
Link .
The posts were erected under the Coal and Wine Duties (Continuation) Act of 1861 to mark the points at which duty had to be paid on coal being transported to London. The boundary was set at that of the Metropolitan Police District, and the resulting revenue was used by the Corporation of the City of London to fund public works. For further info see
Link .