Yes, don't forget about the castles. You can't go to England without visting at least one castle, maybe someplace like Warwick Castle. Also don't forget about Stonehedge, if you have the time.
I also remember visiting the County fair in Coventry when I was six, don't know if those are still around now, but it was fun from a six year olds perspective. Lol, also remember hearing tales of a woman, Lady Godiva, riding nude on horseback through the streets of Coventry. As a six year old kid visiting England, I never expected to hear something like that. Maybe about a dragon are two, but not about a freaky lady riding nude on horseback.