If the system that elects MPs to Westminster was obviously the most democratic one available, there would be no need to use alternative modes when electing the UK’s devolved assemblies or England’s regional mayors. The fact that first past the post (FPTP) was not preferred when establishing those institutions reflects an acceptance that there are better ways to turn popular opinion into fair political representation. So why should the Commons stick with an inferior system?

This question is raised by an amendment tabled to the representation of the people bill, which returns to parliament next week. The call to establish an independent national commission on electoral reform has been endorsed by 185 MPs.

Andy Burnham has backed electoral reform in the past and, as the Guardian reported this week, pressure is growing on the prime minister........

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