IMO- WORST CASE SCENARIO- It doesn't work out and the economy collapses and we become a second world country like Russia 20 years ago. We have to endure hardship (although I don't think there will be famine) and also we will have to endure the global humiliation of needing aid from wealthier countries. However if our economic collapse produces a domino effect making other countries also succumb to economic decline then that's their fault and they should of been better prepared for the vigour's of existing in a global community.
IMO- BEST CASE SCENARIO- the economy buckles at first, perhaps there are people who grumble. But then we enter a golden age and our country serves a global beacon of empathy, love and endeavour. Real endeavour as in the romantic 'standing on the shoulders of giants' Newtonian type- not the B.S endeavour politicians refer to in lame attempts to bury us with their very narrow in parameters, hegemony of aspiration. People will become philosophers and poets and artists and everyone will be happy. Except rich people who need servants and drudges to work in factories. Lots of people will take up yoga and kite flying. There will be less cortisol, less crime and violence. Jeremy Corbyn will have a third testament of the Bible written after him and all other politicians apart from Tom Watson will be footnotes. The aliens which are watching us all the time will decide that we are finally ready to be welcomed into the Pan-Galactic brotherhood and we will all get to go surfing on super novas and live for ever.
I don't know if we should go for it.