Basically... Top division of 12, played for so long and then split into a top 8 who played for the title and then the bottom 4 started a new league with the top 4 from Championship (not sure what happened to the other teams, presumably they battled out to avoid relegation). This new group of 8 then had their points reset and played each other (maybe twice) and at the end the top 4 in the mini league would be in next year's Prem and the bottom 4 in the championship. So basically in theory you could end up with the bottom 4 Prem teams always winning the mini league and there never being any promotion or relegation