1) Is there a clear problem to be solved by the mutual? The public and politicians like mutuals that solve problems. Village shops, pubs, football clubs etc have all shown that it is easy to grasp what the problem they are solving is.
2) Is there public support for solving this problem? The test is whether the area to be mutualised is something that the average person will see the logic and benefit of.
3) Is the model simple to understand? The solution needs to be one that it is clear to all how it will operate and why.
Once these three tests have created a shortlist, there are a whole range of other factors that will come into play to ensure that long term sustainable businesses are created. But any incoming Government would be wise to look at the big picture first.