Social democracy is a system where (loosely) all citizens are involved in all decisions. It's not the democratic system we have in place: the UK is not run along the same lines as X Factor.
Constitutional democracy in the UK is one where the the Sovereign (the Queen) bestows upon an elected upper and lower
Representative house the authority to make decisions for the country. We, like many other developed countries have a triparty system of
checks and balances, with an unelected
Executive function (reporting to the Queen, hence they're called Her Majesty's... (HMRC being an example), and a
Judiciary to enforce authority over both other functions. (The Judiciary is kept in check by way of the fact that the Representative function determines the laws and the Executive function carries it out.
The key point here is that a referendum has no binding authority in Constitutional democracy. As I've said many times, it has the democratic weight of a public opinion poll, or a petition. That's not to say it carries no social weight at all, just not in any legal or political authority in the way in which democracy is defined. The only way it will is if the UK seeks to redefine Constitutional democracy. Mike was saying that we've somehow voted to Leave and should now all move on (and out of the EU). But we have to remember that this was a referendum, not an election.
I set this out (admittedly rather mischievously) in t
his post and the couple of pages following in the other thread and also
here in this thread where I tried to explain it clearly.
This paper issued by the House of Lords also broadly confirms what I'm saying, though I accept that not everyone accepts this position yet.