I was surprised to learn the following from that article:
David Cameron is not the first Tory leader to embrace closer military and political union with Britain's best enemy across the Channel. One of his predecessors once proposed an "indissoluble union" of Britain and France, suggesting that "the two governments declare that France and Great Britain shall no longer be two nations, but one Franco-British Union. Every citizen of France will enjoy immediately citizenship of Great Britain; every British subject will become a citizen of France."
The author of this proposal was none other than Winston Churchill. In 1940, with Nazi forces pouring into France, Churchill, backed by the war cabinet, proposed that the two countries become one, combining armies, parliaments and currencies. It was rejected by French collaborationists led by Marshal Petain, who insisted that Britain would soon "have her neck wrung like a chicken".
French documents discovered two years ago reveal that, in 1956, French prime minister Guy Mollet proposed to Anthony Eden that France merge with Britain, with the Queen head of the amalgamated state. Eden turned down the idea, but was more enthusiastic about a suggestion that France join the Commonwealth.
(Brought to my attention by this comment at AQ, to which I have responded with this comment.)
3. Blog comments by me
Just these two, both of which are quite short and hence not worth copying-and-pasting, so I'll just give their respective links: