The question was asked “Can any of you ‘Followers’ guess where this is? Richard was out litter picking when he stumbled across the concrete post with GB on it.”
After speaking with Lawrence it turns out that there are a few of these posts in Aldbury common which are a marker for land that was privately owned by a person with the initials “GB”. It included the Monument, and the area was gifted to the Trust in the early part of the 20th century.
Richard took the picture at the lower end of the gully that goes down from the wooden bridge off Duncombe Terrace.