According to Wikipedia "1965, Diana Vreeland, editor of Voguemagazine said London is the most swinging city in the world at the moment."
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Swinging London - 1967 TV is rated/received certificates of:
Belgium:KT
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The cast of Swinging London - 1967 includes: Jimmy Frey as
Singer The Kinks as Singers Helen Shapiro as Singer
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Blowup
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There are a variety of nicknames for London. Some of these
include The Smoke or the Big Smoke, The Swinging City, Reykjavik,
The great Wen, as well as London Town.