I think there would be a resounding 'Out' voye.
The EU we are in now is extremely different from the EU we joined - the federal approach and alignment of currencies and trading has seen the UL marginalised more and more with every year that passes.
the Euro-philes always claim that European trading nations would not trade with us if we were outside the EU.
My perspective is - if the price is right, you will get customers.
Aligned with that is the perception that the UCOHU holds sway over our legal system, and that's a massive vote of favour of removing ourselves from its influence.