From the Best For Britain website, following their MRP voting analysis incorporating effective opposition co-operating I linked to on #40
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Previous polling from Best for Britain, published in May 2021 shows that around 63% of people want like-minded parties to work together at election-time, rising to 70% support among Labour voters.
Such cooperation would only be necessary for one election if a new government introduced voting reform for future general elections because first past the post structurally favours the Conservatives.'