My social prediction is an increase in crime as unemployment sky rockets due to massive recession numbering in the years not months.
First people stop buying houses and creating money through new mortgages. Then they start cutting back on luxuries, wait longer for that new mobile phone. Maybe you don't need that new hand bag. People save their money not spend it, they stop signing up to new credit for that new sofa, that new car, that computer upgrade. If you don't realise the impact of this you need to go look up how money is created.
Companies first cut back on marketing (often the first cut back by any corp lacking funds), next they shift anything they can to cheaper economies - all support heads to India because they have no choice no matter the public relations back lash. Then redundancies start happening. But with less people earning money there is less money being spent.
Tech, RnD and Banks start departing the shores. It takes the employable with them, leaving behind the people who suddenly feel British for the first time.
But you know what? We have no banks, no huge GDP, we are no longer the worlds 5th largest economy, no foreign investment, no new industry to pull us out of the recession. We have no EU for a bail out fund. We have no credit rating. Maybe we start looking at selling more gold reserves, raiding the nations pension fund. NHS cut backs, social welfare cuts.
Brexit has been a resounding nail in the coffin of a once great nation.