Has the Flag of England Changed?

No. The flag of England—St George's Cross (a centered red cross on a white field)—has been used since the Late Middle Ages (associated with the Crusades and the Order of the Garter). It remains unchanged and is the official flag of England within the UK.

It is distinct from the Union Jack (UK flag), which incorporates St George's Cross along with St Andrew's Saltire (Scotland) and St Patrick's Saltire (Northern Ireland).