I can only hazard a guess that certain parties saw it as politically expedient to suggest or imply, in 2008 in the case of the Liberal Democrats or in 2017 in the case of the Conservatives and the Labour party, that they would indeed offer, or respect, a referendum. Now too many of the parties are finding it politically difficult.
This is not about us. It is not about individual parts of the United Kingdom and individual constituencies. That is not how the referendum campaign went. Nobody came and asked us questions on a constituency-by-constituency, country-by-country or region-by-region basis. We are in this mess now because we have turned the issue into a political football.