Citing OUtlaw09's last post in part:
WHAT is interesting is that the vote to leave was basically an "advisory vote" to Parliament as a Constitutional change vote would have required 2/3rds to vote for it and this is in fact a Constitutional change when 40 years worth of merged EU/UK laws and regulations must be changed back to UK standards.
The UK does not have a constitution, so there is no law stating such a change needs a 2/3rds vote.

In the 1979 referendum in Scotland:
..the referendum legislation also required 40% of the electorate to vote 'Yes' for the plans to be enacted and this was not achieved.
Link:https://en.wikipedia.org/wiki/Histor...ish_devolution

Yes there is a "mountain" of UK law and regulation that originated from the EU, but that is not a 'constitutional change' in waiting. None of that "mountain" refers to how the UK is governed.