As a free market supporter it is horrifying that protectionist sentiments reign supreme in the UK. Hopefully this does not foreshadow the US congressional and presidential elections in November.
It's actually a good thing for Free Market, since the UK will now be able to define what rules they want to play with, instead of having to rely on EU's bureaucrats.
For their internal markets maybe, but the EU is half of their exports. So either they stop exporting, or they follow the rules of the EU without having a say in them.
There are some good arguments for leaving, but this isn't one of them, IMO.