Irritating isn't it :) This is something that I doubt anyone would ever notice, but still... I know when I run across anachronisms or half baked research in others' stories it can take me right out of them.
My biggest problem at the moment is finding 1960s details relating to places that exist now but have either closed down for periods or moved premises more than once (The Ace Cafe, Norland College, MI5, etc).
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