Complex sentence: In May 2003 the Presentation Brothers made the highly controversial decision to close the school the following summer; however, due to the "Save Pres" campaign by staff and students, the Presentation Brothers reversed the decision and the school was transferred to a trust.
Split into simpler sentences: In May 2003, the Presentation Brothers made the highly controversial decision to close the school the following summer. However, due to the "Save Pres" campaign by staff and students, the Presentation Brothers reversed the decision and the school was transferred to a trust.