I believe that in each action, there is always a solution. Let look at this scenarios:
The U.K has seen its economy rising over the past years and then started dropping inline with the brexit scenarios. This obviously shakes the market and this were the whole problem is based.
I would say that an increase in price will either shift the demand or the supply curve to the left or right depending on the type of commodities.
I think the U.K should look on intermediaries expertise where by though outside the Europe circle, they should always be trading with them with low tax charges. Developing their market outside their countries will surely bring investors inside the country.
The U K economy is said to be strong but can't stand alone. The level at which the world is moving calls for worldly support and free exchange, which was then implemented by the E.U.