Other countries are going to want to keep trade open with them, they have the 5th largest world economy. Any country to deny trade with them simply because they are not a club member would be daft(as the English like to say). A set of trade regulations will be set up with everyone involved and life will continue as normal. They are not taking advantage of a system. Besides, the main issue was the rule of the people and losing their country to politicians who are not even of their kinship.
Of course, although you should have said 'currently have', at one point Friday the UK dropped behind France. The pound is still sliding, shares are down and the AAA rating is now completely gone along with a 'negative' outlook. And this is before we start to talk - depending on who is in power that could trigger a second shock in a few months.
But yes; trade will happen the only question is what is the nature of that trade - do we end up looking like Norway and have no boarder control beyond what we have, or do we fall back to WTO fees and EEA so the banks will stay as they are, or do we end up on WTO with the banks exiting so they can work in the Eurozone and potentially lose other industry. The key point is we don't know and can't know until a new PM is put in place to trigger the process.
And there was no 'main issue' beyond those that people selected for themselves.
For some it was "rule from Brussels".
For others it was the NHS not having enough money.
For some it was immigration and the desire to 'send them home' (often tied up in the former problem).
A friend of mine simply didn't like how the laws were structured.
Others simply wanted to undo their vote in the 1970s without a damn about what happens. (One women even said "I voted out, I know it wont impact me but I worry about my grandchildren now" which is like... arrgh...)
There was no single unifying issue which everyone got around; some simply wanted to punish the government and/or protest the EU... and then got a shock when it turned out their vote counted :lol:
British people want Brits to make decisions for their country.
Some did.
Some had other issues on their mind.
To put this in context leave won by 1.2 million votes.
But this is still only around 1/3 of those who could vote.
This was not, by any means, a unified cry for independence from the British people - it was the outcome of a nasty, misleading, and down right joke of a debate on a highly important issue where is seem people didn't know or understand what they were voting on or the impact it would have.
This is why it is such a mess; it has divided, it has enraged, it has inflamed and it has left the government and the people more divided than we have been for some time to come.
The markets slide.
The pound slides.
Boris did say earlier they were stable which was funny...
In a way we are lucky; many people over the years wanted to watch the world burn - we get to see at least one country start a fire under itself...