"There is nothing advisory when a vote is held before which the nation's PM promises, verbally and in writing, that the government will obey the result and carry out the wishes of the majority. That forms a binding contract with the electorate. Much as many with personal disappointment issues would like to rewrite the terms under which people voted after the event because they don't like the result, it would be fundamentally undemocratic to allow them to do so. Parliament is only sovereign because the people allow it to be so. That sovereignty is not owned by parliament but simply held in trust. Were it otherwise we wouldn't need to hold regular elections."

Don't claim to be the author but certainly agree with the opinion.