1. North Sea - Located to the east of Great Britain, the North Sea is a shallow sea that connects the Atlantic Ocean to the Baltic Sea.
2. English Channel - Separating Great Britain from France, the English Channel is a narrow strait that connects the North Sea to the Atlantic Ocean.
3. Celtic Sea - Located to the southwest of Great Britain, the Celtic Sea is a part of the Atlantic Ocean that extends from the English Channel to the Irish Sea.
4. Irish Sea - Situated between Great Britain and Ireland, the Irish Sea is a semi-enclosed sea that connects the Atlantic Ocean to the North Channel and the St. George's Channel.
5. Atlantic Ocean - The Atlantic Ocean is a vast body of water that surrounds the British Isles to the west and south.
