Greetings,
Looks like a really attractive lane.
Although I do n't live down your end of the world the system is the same throughout England and Wales. All County Councils have to hold two documents; called the Definitive Map and the List of Streets. These are paper documents but most are transcribed onto computer systems, as with all systems the data can be slightly out of date with the real world.
Your local council seems to have a good system, may I suggest that you take a look at;
https://www.westsussex.gov.uk/land-wast ... statement/Hope this helps somebody.
TTFN
Hugh.