Sorry mate, but I don't see how potentially putting up trade barriers (tariffs and customs) between us and our nearest and largest market is a way of 'growing' our economy.
There's a load of old tosh being spouted about the supposedly 'exciting' opportunities presented by Brexit, but I'm yet to hear one tangibly explained. The narrative appears to be that the rest of the Globe has suddenly just been opened up to the UK, which a complete fallacy imo. It also ignores the simple fact that most of our manufacturing business is foreign owned and produces here for the UK and EU markets primarily.
If we retain our full single market access, then it'll be at a cost, and not much else will change. If we lose it, the cost will be a lack of future investment and a reduction in GDP growth.
I fail to see what actual tangible benefits (either way) will felt by the average Joe as a result of Brexit. What do you think the average man in the street will gain from this ultimately? And I mean tangibly, as in it'll bring a positive to his daily existence?