This worst case scenario would mean tariffs on some goods. But I think we can do better than that. There are already indications that German car manufacturers would ensure their government does not impose tariffs on UK cars – why penalise BMW-owned Minis and Rolls Royces? There would be such demand from all sides for a better deal - for some added clauses sprinkled on top to make sure there weren't barriers to the trade that is so important for France, Germany and other EU member states. They need access to the UK market.