Europe is the continent, including France, Germany, the Netherlands, etc., etc., etc.
Britain = the Bristish Isles = Great Britain = GB = the United Kingdom = UK, which comprises the following countries:
England, Scotland, Northern Ireland, Wales.
Southern Ireland (Eire) is an independant country, also part of Europe.
Scotland and Ireland (the whole island) have kilts in their national dress, but are slightly different in style.
They also have Gaelic as their ancient language, though these also differ (though reading them both is easier than speaking).