OK, perhaps I shouldn't, but David is not just a long term (suffering?) colleague of mine but a more than competent boundaries surveyor. I have yet (big blushes) to read his book, but Amazon have.
My brother and Dad both work for a water meter reading company and both struggle with the lack of geospatial information available to them. They have tried Elgin but they are only OK if there are roadworks around their area of interest. How do they obtain large scale mapping of the area they are interested in without paper maps?