That's some fresh mad speculation there.
No more than suggesting that Brexit will cause prices to increase significantly.
Brexit chaos caused by the useless Tories has already hammered the currency, what bad news could come that would make it worse now? Every option now leads to a resolution of the issue which will calm markets. Added to that we will be free of the EU tariff wall (unless the idiots keep us in the customs union, in which case it's not Brexit).