Abandoned City San Zhi, Taiwan

The situation in London is a historical anomaly: the City of Westminster and the City of London are geographically small but historically significant parts of the Greater London conurbation that have independent city status.
A Review of Scotland's Cities led to the Fair City of Perth, Scotland, losing city status. By both legal and traditional definition, a town may be of any size, but must contain a market place. A village must contain a church. A small village without a church is called a hamlet.
The UK's five largest cities are generally considered to be London, Birmingham, Leeds, Manchester and Glasgow, but this is based on the population of the conurbation as a whole. In terms of formal city boundaries, the largest include Bristol, Cardiff, Edinburgh, Liverpool and Sheffield.