Ok - Critique time:
first, your diorama uses far too much icing for a true English Castle... unless it was built during the 1600's when they tended to do a lot more with lard frosting.
second, the shade of green on the doorway is slightly off... needs a bit more blue...
Finally, as if this wasn't enough... true English Yellow Frosting castles never used the modern "4" element, but instead should have the more accurate roman numeral equivilent of "IV"
Sheesh - what some people try to pass off as "realistic"....
:-)