>>49951370The onus of proof is on Pierre. The only source for this claim is Mitterand's biography. There are not government documents saying this ever happened - the previously classified stuff is all in the public domain and there's no mention of this.
Besides if you think about it, it's ridiculous. The UK's nuclear policy doesn't allow us to use our nuclear weapons in that way, so it's an empty threat. We would only use nukes if an aggressor used them (or similar devastating weapon) on the UK.