Interesting statement that isn't it. I know this but most people don't. I was reading the Express article on the French talking about the major disruption in the EU fishing businesses if the UK leaves without a deal and denies the EU fishing fleets access to UK waters.
Whilst I'm aware of the 95% situation I thought I'd go and find an article which discusses it. To my amusement, the best article I found with least effort was the BBC.
In this article it addresses the claims. Interesting that Remain tried to use big numbers to influence the people. Over 200,000 they trumpeted.
How many businesses are there in the UK?? 5.4 million!
It is a think to keep in mind. Whilst large trade is heavily linked to the EU, medium to small trade is heavily UK biased.