The exception to this "don't chat to other Aussies" rule is in the cafes. There are whole websites devoted to finding the best Australian (and Kiwi) run coffee shops in London and you will bookmark those sites and let them be your guide. The word "Flat White" on a menu will fill you with endorphins and you will trick your British mates into brunching with you at these establishments because if one more person tries to convince you that a "Full English" is a good use of breakfast food you will go postal. Related: welcome to the avocado party, England! You're only 40 years late!