For Brexiteers who imagine that we can go back to trading as we did pre EU/EEC/Common Market, the world has moved on. We no longer have a significant manufacturing base. We are not a world leader in much any more, China is doing far more with regard to renewables etc, we are trailing in technology advancements - did anyone hear the news report from Seoul yesterday where 3.5million residents have 1GB internet speeds; '3rd world' countries in Africa make better use of mobile phone technologies to transact business.
We don't have the agricultural capacity to feed ourselves, we have a significantly ageing population, an NHS on it's knees from underfunding, an education system which doesn't seem to know what it's outcomes are, big businesses who avoid paying tax in the UK plundering our seemingly insatiable need for cheap tat.
Oh, but of course, we can trade with the Commonwealth. Hahahahahahahahahahahahahahah.
Factor in freight costs for Australia/New Zealand/Canada as opposed to France/Germany/Poland. Always assuming Australia et al want anything we've got.
What about Malaysia/India/Nigeria/Zimbabwe/Pakistan? They love their former colonial overlords, right? Or if not, there's always Zimbabwe. Of course, China is already doing massive deals with most of Africa but I'm sure they'd make room for little old us.
As for our country being overpopulated - it's not down to EU migration; 5% of the UK population are EU Nationals, or approx. 2.9 million. That's a drop in the ocean. Or are Brexiteers conflating EU Nationals with the 2.4% of the population who are from other parts of the world. So that's a total non British population of 5.3M, or approx. 8% (source: Reality check 08/07/16). Or are some Brexiteers like someone I heard a few months ago who reckoned us leaving the EU would be a good thing because 'We can send all the Muslims home......'
I despair