My wife’s great aunt* was born and raised in Sutton Coldfield. Growing up between the wars she and her siblings saw Sutton grow and change a great deal, eventually becoming officially part of Birmingham in the 1970s. The last letter she wrote to us when we lived in Erdington was, as was all of her correspondence, addressed to “…Johnson Road, Erdington, Nr. Birmingham”.
*Watch out for autocorrect on that one.