Preston, Newport, Stirling, Lisburn and Newry were all granted city status as part of the Queens golden jubilee celebrations. Not sure if that's what you're looking for though.
It could be Cardiff.Cardiff was given city status in 1905, but it was not until 1955 that it was declared the capital city of Wales, making it Europe's youngest capital city.
You are better off to post these quiz questions in Quizzes and Puzzles budweiserlea..they will still be answered regardless of the subject matter.Put them all in one post though as the natives over there get restless if there are too many posts from one member on the page . Good luck with your quiz.