Momentum, the Labour campaign group dedicated to keeping Corbynism alive, this week demanded that Keir Starmer commit to introducing a proportional voting system should he win election, replacing the current first past the post model for electing MPs.

‘A popular consensus is building across the labour movement for a change to our first past the post electoral system, which has consistently delivered Tory majorities on a minority of the vote and hands disproportionate power to swing voters in marginal constituencies,’ said Gaya Sriskanthan, Momentum’s co-chair.