An amendment to the representation of the people bill, which calls for a national commission on the electoral system, is anticipated next week. A recent YouGov poll indicates that 55% of Labour MPs support this amendment, with 29% opposing it.
Separately, the Labour conference next month is expected to vote on a motion for a national commission. This motion has been put forward by Labour for a New Democracy and is supported by many constituencies.
Prime Minister Andy Burnham's stance on electoral reform is seen as significant. If he signals an intention to include electoral reform in the next manifesto and confirms the need for a national commission before the election, the amendment may be withdrawn.