Figures are from each country's respective citypopulation.de page. I am not entirely sure if Newcastle is considered to be a coastal city, considering the area is urbanised right up to the sea. If anyone corrects me, I can and will remove Newcastle from the quiz.
I always appreciate your feedback. I was originally sure that Hull was on the sea but I can't find anything to back that up. Southend and Newcastle have distinct, arguable coastlines which don't lie on rivers/estuaries but Hull only borders the Humber Estuary and Hull river, so I couldn't justify adding it to thr quiz.
Amsterdam is on the inland Markermeer (a lake according to Wikipedia), Rotterdam is on the Nieuwe Maas, about 25 kilometres from the North Sea, Hamburg is on the Elbe river, quite far inland, Gothenburg is on the Kattegat, which may be viewed as part of the North sea, the Baltic Sea, or neither (again according to Wiki), but my source map did not include it as a part of the North Sea.
I have checked every large city in proximity to the North Sea before I included/discluded them from the quiz. The only one I'm not sure of is Newcastle's inclusion.
Amsterdam is on the inland Markermeer (a lake according to Wikipedia), Rotterdam is on the Nieuwe Maas, about 25 kilometres from the North Sea, Hamburg is on the Elbe river, quite far inland, Gothenburg is on the Kattegat, which may be viewed as part of the North sea, the Baltic Sea, or neither (again according to Wiki), but my source map did not include it as a part of the North Sea.
I have checked every large city in proximity to the North Sea before I included/discluded them from the quiz. The only one I'm not sure of is Newcastle's inclusion.