That's exactly what he did - if you look at this history section, he was broadcasting analogue TV signals to his house, and embedding his own Ceefax service in the signal!
Very interesting tool! My Yorkshire grandfather would often say "kirk" instead of "church", which I always thought was more of a Scottish word. Doing a place name comparison of those words shows a fairly clear division of north and south - https://placenames.rtwilson.com/#W3sidGV4dCI6ImtpcmsiLCJjb2x...
I remember participating in the Domesday Project in the eighties when I was in primary school, and it inspired me to help set up similar project in 2005 (https://www.geograph.org.uk). At the time, we were in contact with the BBC to see if we could incorporate the Domesday data, and while they were warmly receptive to the idea, they concluded the legal framework under which the original data was collected did not allow for much flexibility in re-purposing it.
I'm sure I've read a much older short story, possibly by Frank Herbert, where in the future computers do all the calculations so humans have forgotten how to do basic arithmetic. It is rediscovered, only now it's much cheaper to put a human in a missile to perform guidance calculations than using an expensive computer! The HN hive mind will probably remember this better...