The 5th and 6th Century

Minor nitpicky error:

The Crown Dependencies, which are part of the British Isles are part of neither the Republic of Ireland nor the UK. They are "territories for which the United Kingdom is responsible" but do not belong to the United Kingdom. One might say there are five different "countries" making up the British Isles, these being the United Kingdom, the Republic of Ireland, the Bailiwick of Guernsey, the Bailiwick of Jersey and the Isle of Man.

Britons just love to be special and make talking about their different entities a minefield. Similar subjects are city status and the different types of districts of England and especially the combination of the two, i.e. London, which consists of a ceremonial county, Greater London and a sui generis authority, the City of London. Greater London is further split into so-called "London Boroughs", which are not metropolitan boroughs, such as those of the West Midlands and Greater Manchester for example, because that wouldn't be

special enough. Furthermore, four of these boroughs have special status, as they are Royal Boroughs, because why not? Also two places in the ceremonial county of Greater London have city status, even though it is quite obvious that differentiating them from their surrounding, equally urban regions represents the pinnacle of bêtise. Ah yes, I forgot to say which place the other city is; that would be the City of Westminster. Just to clarify, the City of London is not part of Greater London and thus not a London Borough.