For UK, see England
Ever since Æthelstan became King of the English in 927 CE, some in England – starting with Æthelstan himself – have had difficulty recognising where England ended and the rest of the world began. Indeed Æthelstan meddled so much in the land of the Scots that they allegedly nicknamed him “The Bastard“.
Given the dominance of England within the Untied Kingdom, this has persisted down through the centuries that separate the present from the days of Ælfred of Wessex‘s grandson.
The latest manifestation of this Englandshire = the entire UK occurs in yesterday’s online edition of Bristol ‘Live’, the city’s unfortunate newspaper of warped record, which managed to defy both demographics and geography in one awful little puff piece masquerading as “news“.
A screenshot of the headline of the offending article is offered below.

Although Wells is described in the piece as “England’s smallest city“, there is no empirical evidence provided of its lack of size. Your ‘umble scribe used a little-known research technique called using a search engine to provide an answer; in this case 5 seconds’ work gave a census population figure of 12,000 for Wells.
However, Wells is not the Untied Kingdom’s smallest cathedral city. Cymru has two cathedral cities that together have a combined population of well under Wells’ 12,000 souls. First of all there’s Llanelwy/St Asaph (pop. 3,485) and Tyddewi/St Davids (pop. 1,751), which is actually the UK’s smallest cathedral city in terms of number of residents.
Your correspondent is surprised that today’s ‘journalists’ are not familiar with this research technique he often uses, which is recommended they use as a matter of course. 😀