Brexit returns power to the UK electorate

Nothing is certain until we understand what the British electorate will do with their power.  The betting now is that the British parliament will screw things up, like Italy.

The Brits can do well if they remember that fouling up labor or trade law immediately  bounces back in term of trade, exchange rates.  Brits no longer have a larger aggregation to lean on.

However, there is  no reason firms and households in the UK cannot follow EU rules when it suits them, with no bias against the UK government.  That process is called economic freedom,  The British parliament should grant enough economic freedom  so that London remains the world's banking capital; and exporters or importers can easily trade.

Immigration.  Simple, remove labor regulations as much as possible.  If the labor pool is not responsive, the trade terms get ugly very quickly; Trade is rebalanced with immigration. .  I am betting with the crowd here, the British voters likely do not know what 'on your own' and 'terms of trade' mean.  British voters  will vote policy that makes their own lives hectic, via the trade channel; they won't make the connection.