Brighton isn't England's 10th most populous city - in the 2011 census (where it's combined with Hove) its population was 273,369. This is less than Sunderland (275,506), Coventry (316,915), Wakefield (325,837), Leicester (329,839) and Bradford (522,452), as well as the other 9 cities already featuring in the quiz. See http://www.ons.gov.uk/ons/rel/census/2011-census/key-statistics-for-local-authorities-in-england-and-wales/rft-table-ks101ew.xls