The English Channel is not a sea; it is a channel. The River Cam, the River Thames and the Isle of Man should be capitalised. Yorkshire is only a historic county, and has been divided into four actual counties. North Yorkshire is still the biggest county in the UK though. And the closest country to the UK is Ireland, since there is a land border. As a "true Brit", I can say that it doesn't really test me, and the only "testing" part is correcting the quiz at the end.