Well
If you are going to go into the ATZ then you really need to call up Goodwood. Otherwise it can be polite if you are going to over fly them.
I must admit etiquette of who to call, to a self admitted socially awkward computer geek, is incredibly difficult. It's almost like in other languages where you have to agonise if it's now OK to refer to somebody as tu/vous or jij/u but far more ambigious.
I especially detest the oxford AIAA where you can overfly several airfields, in a space controlled by AIAA, just WHO do you talk to ? The airfield, the aiaa controller or maybe just London Information ?
Now I understand why those PPL exams were made of questions that all had right answers but some were more "right" than others....