Possible Post-Brexit Models For Engaging With The EU

A lot has been written about the economic effects of Brexit, much of it contradictory – for example: The 100 "worst" EU derived regulations are consistently said to cost the UK economy £33 billion per year, but this has been challenged by research that has looked at the Government's impact assessments (always undertaken as part of any consultation concerning the implementation of new regulations) done in respect of each of these 100 regulations and which concludes that the UK economy benefits from them to the tune of £58 billion per annum. Can there be any more certainty about the legal effects of a Brexit?

If we left the EU, it seems likely that we would wish to continue to have a relationship with it – if only because over 50% of what we export currently goes to the EU. How could such a continuing relationship be achieved?