That concept ended long ago, now it is what party HQ and what the whips desire. This is just more evidence if needed that we need a system based on the swiss system of direct democracy, where referendums are legally binding for parliament. To start a referendum in motion, 2.5% of the population would need to sign a petition asking so - the referendum then would be granted, most likely to coincidence with local elections/general elections and European elections.
Of course we know why that will not occur anytime soon in this country, we would end up doing the exact opposite of what the three main parties [Labour, Conservatives and the Liberal Democrats] want;
- We would be gone from the European Union.
- The burqa would be banned in this country.
- The death penalty would (possibly) be re-introduced.
+ along with many many other issues.