The transaction between an MP and his or her constituents is very simple. The MP is not obliged to cowtow to the wishes of the constituents. The constituents are not obliged to re-elect that MP. Every MP has thousands of constituents who would far rather have someone else "representing" them. And in no way can constituents regard their MP as their delegate. Naturally, it would be an outrage if an elected member serially disregarded their party's manifesto, but that's fine because the constituents have the remedy which won't be long in coming. Both major parties overwhelmingly voted for the referendum and for Article 50. Both parties contained large numbers of members who voted in both votes against their better judgement. Before each of those votes in turn there was a groundswell in the country in favour of both so powerful that voting against would have been disastrous for the party. MPs voted in both ballots in their parties' interests and hundreds of MPs who knew that brexit was the worst idea in the world were too gutless in both to oppose what was a terrible notion. As now, hundreds of MPs ignored the best interests of the country. That was a dereliction of duty and a kick in the bollocks for democracy. The undemocratic referendum campaign was the icing on the cake. In terms of knock-on effects, this is going to go down as one of the worst periods in history, and not just for this country.