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There are conspiracy theories that some military elements were plotting a coup against Harold Wilson in 1974, and that Lord Mountbatten had been chosen to head a "unity" government. This is borderline ASB, but is it at all plausible that a non-laughable attempt could have occurred, and how much resistance would it have attracted, both from the military and from the public?

Also, what would be the short and long term political effects of a non-laughable coup attempt?
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