古代英国的政权，从1066年到1558年，拥有现在法国的一些土地，比如诺曼底地区，加来地区。英吉利海峡，真的是英国的内海

https://en.m.wikipedia.org/wiki/Normandy#:~:text=For%20almost%20150%20years%20following,Normandy%20and%20King%20of%20England.

For almost 150 years following the Norman conquest of England in 1066, Normandy and England were linked by having the same person reign as both Duke of Normandy and King of England.

 

https://en.m.wikipedia.org/wiki/Pale_of_Calais#:~:text=The%20Pale%20of%20Calais%20was,Treaty%20of%20Br%C3%A9tigny%20in%201360.

The Pale of Calais^[1] was a territory in Northern France ruled by the monarchs of England for more than two hundred years from 1347 to 1558.^[2] The area, which was taken following the Battle of Crécy in 1346 and the subsequent siege of Calais, was confirmed at the Treaty of Brétigny in 1360. It became an important economic centre for England in Europe’s textile trade centred in Flanders.