Sirius,
Places..
Although I am a native of south-east Northumberland, (Blyth), to cope with the business of hierarchy of places in C19th, I have had to "unlearn" my knowledge of modern-day places, which just complicated my research.
e.g. In 1800s half of Blyth (today's most populous town in Northumberland) lay within and under the sway of Cowpen, one of the five "townships" of the ancient parish of Horton. The other half of Blyth lay within the parish of Earsdon.
So Blyth people got bapt, married or buried at Horton or Earsdon, depending on which side of the parish boundary line (Union Street) they lived. And knowing this would help me look in the right place for the required info
But by now Blyth, once the new boy on the block, has gobbled up all it's elders.. and Cowpen is just one of it's satellites.
I found that some pages on Genuki web site were very helpful for me trying to learn about civic and ecclesiastical administration...... there is a "live" map of Northumberland showing it's parishes ( click on any to get the full A-Z of whatever parish, including all the towns and villages etc, lying within each parish)..
There is also a list of Northumberland Registration Districts, showing each Districts sub-district offices, and all the places covered by the District Office.
So, for example, you can see that Tynemouth parish and Wallsend parish are two separate entities. But for BMD registration purposes, Wallsend was under the jurisdiction of Tynemouth RD ( but to save Wallsend folks shoe-leather, one of the ten or so sub-district offices was situated in Wallsend.... and one in Blyth, and North Shields, etc.
We shall next discuss Urban Sanitary Districts.... only kidding.
Michael Dixon