Acts of Parliament for Genealogists
Transcripts of Various Acts of Parliament of Interest to the Genealogist.
English Counties, Parishes, etc. for Genealogists
This site does a good job of explaining some of the more mysterious organizational structures of interest to the genealogist with UK ancestors. [The original link is gone. This link points to an archived copy on the Wayback Machine]
From the Hertfordshire County Council.
United Kingdom & Ireland » England » Counties » Hertfordshire » Government: City, County, Province, State