Indeed, and presumably well before 1965, which is when Greater London was created. Most of the non-disambiguated High Streets will be in the Greater London boro

Indeed, and presumably well before 1965, which is when Greater London was created. Most of the non-disambiguated High Streets will be in the Greater London boroughs (Bromley, Bexley etc.) When I was a kid, Bromley was already a London borough. But we sure as heck didn't consider Orpington to be proper London! ;-)