A crucial poll will see the Co-op face its future later when key principles on radical reform of the troubled mutual go to the vote at a special meeting.
Former City minister Lord Myners has proposed a major shake-up of the food-to-funerals business after a disastrous period saw it slump to a £2.5 billion annual loss - its worst ever - in 2013.
But Lord Myners fears that traditionalists within the 150-year-old organisation are "still stuck in denial" about its problems and will not support the plans.
These include sweeping away the existing 20-strong board of representatives from the co-operative movement, who currently include an engineer, a plasterer and a retired deputy head teacher.
More top news
Ministers are also looking at schemes such as “lock-in agreements” to reduce the 250,000 sales that fall through annually.
Staff have racked up hundreds of thousands of dollars in fees as Robert Mueller and House and Senate committees probe Moscow’s meddling.
It is "clear" ministers cannot proceed with the current Bill, Sir Keir said, threatening to "work with all sides" to ensure revisions.