My mother (*1935) was outraged her whole life that Birmingham stopped being in Warwickshire. The oddest one was when I was a civil servant and got a letter calling for Ted Heath (at that time still alive) to be hanged for treason for moving Monmouthshire into Wales.
On this theme: 1) to her dying day, my aunt refused, as a resident of the royal town of Sutton Coldfield, to use a Birmingham postcode. 2) in my youth, when I moved to Hadleigh in Suffolk, I knew an elderly resident who had visited Ipswich (10 miles away) three times in her life. 1/2
The idea that Somewheres and Anywheres were anything new for the 2010s is daft. But it sold a book, I suppose. 2/2
If you want an extreme example, the post office did a post code change and moved a street from B28 to B11. The complaints still roll in 25 years later.
I think I could make a good guess as to the name of that letter-writer