I think youll find 101 is a double hat-trick under Australian logic
Since no Southern Hemispherean is ever going to achieve the feat of taking two hat-tricks in a match to achieve the double, I suppose we'll just have to let them call four in four a double, won't we....
Not while we play in a league absent pommy batsmen anyway!*sigh* I remember not so long ago when we were in a position to ridicule English batsmen.