What I hope doesn't happen, whether we stay or leave, is that anyone thinks "Oh good, we are staying in the EU so our exports are secure with them" and sits back, or, "Oh good, we are leaving the EU, so now we can return to our trade with the rest of the world", and sits back.
No use claiming "British is best" - we are expected to prove it, time and time again, to tell them, in the language of the buyer, just why what we have to offer is the best in its field and the best value for money. If we can't, the contracts will go to Germany, to France, to a country in Eastern Europe, if we are still in the EU, to China or to India, if we are not.