Actually, (this might get Gabriel a few extra marks), at one time Berwick-upon-Tweed was counted as a separate country in the Kingdom (a long time ago).
There is a curious apocryphal story that Berwick is (or recently was) technically at war with Russia. The story tells that since Berwick had changed hands several times, it was traditionally regarded as a special, separate entity, and some proclamations referred to "England, Scotland and the town of Berwick-upon-Tweed". One such was the declaration of the Crimean War against Russia in 1853, which Queen Victoria supposedly signed as "Victoria, Queen of Great Britain, Ireland, Berwick-upon-Tweed and all British Dominions". However, when the Treaty of Paris (1856) was signed to conclude the war, "Berwick-upon-Tweed" was left out. This meant that, supposedly, one of Britain's smallest towns was officially at war with one of the world's largest powers – and the conflict extended by the lack of a peace treaty for over a century.
The BBC programme Nationwide investigated this story in the 1970s, and found that while Berwick was not mentioned in the Treaty of Paris, it was not mentioned in the declaration of war either. The question remained of whether Berwick had ever been at war with Russia in the first place. The true situation is that since the Wales and Berwick Act 1746 had already made it clear that all references to England included Berwick, the town had no special status at either the start or end of the war.
Nevertheless, in 1966 a Soviet official waited upon the Mayor of Berwick, Councillor Robert Knox, and a peace treaty was formally signed. Mr Knox is reputed to have said "Please tell the Russian people that they can sleep peacefully in their beds." To complicate the issue, some have noted that Knox did not have any authority with regard to foreign relations, and thus may have exceeded his powers as mayor in concluding a peace treaty.
(Again, from Wikipedia)
