The city is home to 261,546 (mid-2014 est.) people, making it the 30th most populous built-up area in the United Kingdom. It is governed locally by Plymouth City Council and is represented nationally by three MPs. Plymouth's economy remains strongly influenced by shipbuilding and seafaring including ferry links to Brittany (Roscoff and St Malo) and Spain (Santander), but has tended toward a service-based economy since the 1990s. It has the largest operational naval base in Western Europe – HMNB Devonport and is home to Plymouth University.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Where does Plymouth rank in population among the cities of the UK?
30th