I think Prince Charles or his two sons are not like that -- they eats whut other countries prepare for them -- Prince Charles in particular is a pretty good diplomat. Now Prince Philip can be incredibly rude & ignorunt -- calling foreigners rude names. Im not sure about the how the Queens foreign dining habits -- I do believe she is quite limited in her foodie tastes, preferring plain ENglish fare.
We always get small portions here in Europe -- only America serves those gargantuan platters filled wid potatoes, steaks, chickuns & more potatoes. Not that thats bad, mind you. Heheh.