Quidditch is just Aussie Rules with broomsticks

I watched the first Harry Potter movie with the kids yesterday, they hadn't seen it and I hadn't seen it since it was released.  The thing that stuck me, apart for how young the main actors were (and how bad they were at acting. Granted, they got much better in later movies..) was how much the Quidditch field looks like an Australian Rules football oval.

This is a Quidditch Field

This is an Aussie Rules oval

I remember thinking this at the time I first watched it 15 years ago, but promptly forgot.  The similarities are uncanny, I can't believe it's a coincidence.  Note the three posts in Quidditch, there are four in aussie rules, but as you have to kick between the post, it leaves three scoring areas (the same as Quidditch.)  Even the field line markings are the same

I'm not sure JK Rowling intended this.  But I'm certain there must have been an Aussie on the production design team for Harry Potter and the Philosopher's Stone.