Daily Telegraph: France offered to "merge" with UK in 1950s

And it appears it wasn't just a pickup line:

Britain and France discussed a "union" in the 1950s and even talked about France joining the British Commonwealth, it emerged today.

Previously secret documents uncovered in the National Archives reveal how, on Sept 10, 1956, the French prime minister Guy Mollet came to London to discuss the possibility of a merger between the two countries with Sir Anthony Eden, then British prime minister.>

Now, English Kings Heny II and Henry V -- they didn't just discuss it, they did something about it!