At the Citizenship ceremony, the candidates must swear allegiance to the Queen and her ministers. There are alternative oaths for those with no religion, but the rest swear by Almighty God. The Queen is the monarch of Scotland, Northern Ireland and Wales, and therefore there are questions on the Test about St Andrew's Day, Hogmanay and so on, and other significant dates and special days in all parts of the UK. Not to mention those concerning the legal, employment, administrative, religious and education systems in Scotland, Wales and NI. If a candidate wishes, they can take the Test in Gaelic or Welsh.
It's pretty comprehensive. (And difficult!)