Sobel added that public and political appetite for structural change remains high as the government transitions.
"MPs still have five days left to sign and it's clear with the change of government coming that the commission is not just a clear signal to break the status quo, but hugely popular with both MPs and the public," he stated.
Milton Keynes North representative Chris Curtis pointed out that voting reform aligns with Burnham's historical political platform.
"Andy has consistently made the case for PR [proportional representation], starting with a national commission," Curtis said.
He noted that parliamentary demand for the reform has grown faster than initially anticipated.
"I think he was half-expecting to have a job on his hands persuading MPs to come with him on that – but it's the PLP that's now clamouring for the Government to get a grip on this issue," Curtis explained.
He characterized the policy shift as an easily achievable victory for the new administration.
"You don't have to be Harry Kane to see what an open goal this is for him," Curtis remarked.
He suggested a timeline for implementing the commission alongside other economic priorities: "He should launch a commission in his first 100 days, so he can focus on his other priorities, and bringing growth and hope to Britain."
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The nomination period closes next week, with Burnham expected to be officially named Labour leader on July 17 and prime minister on July 20.