Complex sentence: Kettering Town sometimes took the decision to close the Dale Roberts Terrace if a match's attendance is anticipated to be well below the capacity of the South Stand, preferring to put all fans in the South Stand, to cut costs and create a better atmosphere.
Split into simpler sentences: Kettering Town sometimes took the decision to close the Dale Roberts Terrace if attendance at a game was anticipated to be well below the capacity of the South Stand. It was preferred that all fans be in the South Stand, to cut costs and create a better atmosphere.