[johndoe0815]

Looks like it were the real addresses, see https://www.housebeautiful.com/uk/lifestyle/property/news/a1...

[harryvederci]

Haha awesome, thanks for looking it up!

[ccppurcell]

Phone number looks right too. Correct format for London at the time and apparently 01-359 was the Canonbury telephone exchange, which is almost certainly the closest to Duncan Terrace!

[pydry]

Looks like a different address close by - on a street parallel to upper street.

[agsnu]

Listed as the “new address” in the screenshot…