While the official United Kingdom census does record ethnicity, English/Welsh/Scottish/Northern Irish/British is a single tick-box under the "White" heading for the answer to the ethnicity question asked in England and Wales (while making the distinction of white Irish).
Although Englishness and Britishness are used synonymously in some contexts, the two terms are not identical and the relation of each to the other is complex. Englishness is often a response to different national identities within Britain such as Scottishness, Irishness, Welshness and Cornishness.
Sometimes Englishness is thought to be encapsulated in terms of a particular relation to sport: "fair play," for instance. Arguably, England's "national games" are football and, particularly, cricket. As cricket historian Dominic Malcolm argues, the link between cricket and England's national identity became solidified through literature. Works such as James Love's "Cricket: an heroic poem" and Mary Mitford's "our Village," along with Nyren's "cricketers of my Time" and Pycroft's "The Cricket Field," purported to identify the characteristics of cricket with the notional characteristics of English society, such as pragmatism, integrity, and independence.