It's very common even in England to see the Union flag together with the word England. Wrong, but common. The red on white cross of St. George is the proper English flag. That said, the Saxons are said to have flown a red flag with a white dragon, and their patron saint was not St. George, but St. Edmund.

OTOH. I was taught in school that the flags of the patron saints are the proper flags for Wales and Scotland too, but that isn't really true. The white on blue saltire of St. Andrew is often used to represent Scotland, but there is also a yellow Scottish flag with a red lion and a red border. Similiarly, the real Welsh flag has a red dragon on a background that has white for the upper half and green for the lower half, and is not the red on white St. David's saltire. You can imagine why England would want to suppress the older flags, though.