One of my friends has posted this article on Facebook, looks like an ex-Australian PM saying that no deal isn't going to be a problem because the UK can unilaterally decide not to have tariffs - it something. He says that Australia is basically in a no deal situation with the EU themselves and are doing fine.
Does this hold any water at all? Seems pretty optimistic to me 
https://www.spectator.co.uk/2019/03/no-deal-no-problem/