Here's the thing, as I see it.
Those who think that we would have unfettered access to the European free trade area following a Brexit are - in my opinion - mistaken. There WILL be tarifs on exports from the UK to the EU. On the PLUS side, we would be free to seek tarif agreements with the entire world, something that the EU prevents us from doing. Swings and roundabouts.
However, my objections to the EU are deeper than that, and at a strategic level.
We joined an Economic Community of seven North-Western European (in the geographical sense) nations with very similar economies. This was back in 1972.
In the intervening 45 years, this has grown into a political community of 28 nations, with an increasing preponderance of Eastern European nations. The union is set on expansion even further eastwards, with countries like Turkey being féted.
There are two issues with this.
Firstly, it means that the overall legislative agenda will increasingly be dominated by Eastern European perspectives, and with an increasingly dominant Eastern European voting block in the European Parliament. What is good for Albania is NOT necessarily good for the UK.
Secondly, the EU has a track record of putting politics ahead of day-to-day economics. Hence nations are being invited into the EU with significantly divergent economies, purely for the sake of EU political expansion. Hence Greece and - more recently - Bulgaria and Romania.
Thirdly, the core principle of 'free movement' has been a catastrophe for the lower-skilled manual workers in the original Western European members. Wages are clamped at minimum levels by an endless succession of workers from poorer Eastern European nations migrating into the wealthier nations looking for higher salaries.
This benefits 'big business' immensely, but is a disaster both for indigenous workers, and for community cohesion. It is socially corrosive.
We can continue to operate closely with the European Union in terms of security, crime and justice, research and development, and so forth. But we should NOT be dominated by their political agenda.
That, in a nutshell, is it !