The comment has been taken out of context
If I understand the quote correctly, the guy was very specific about this happening a few weeks after D-day if it all goes to shit and if customs collapse. Considering how much stuff is imported he may have a point.
In any case, while people are concentrating on this non-news item, everybody forgot about the real news item which is that Rees Mogg has been making 19% annual (predicted, so far 14% for the first 9 months) profit off companies moving to Ireland due to Brexit via his fund.
Corrupt? Moi? Surely not. Just the mother of all insider trading and pump and dump jobs. In fact, not even the mother, grandmother, grandgrandmother, but the whole line of progenitors all the way to the times of William the Conqueror.
He is not the only one. I had to do some unrelated trawling through the company registries in Bulgaria and Romania a few months back and I came across a lot of prominent BrExiteers and their investment vehicles investing like crazy into office real estate there.
I always find it hilarious British politicians complaining about corruption in Eastern Europe and ex-USSR. Sure, they are corrupt as hell. Sure some places are really mob state. However, none of them would even contemplate monetizing grand treason.