By the 21st century pupil numbers dropped substantially as parents opted to send their children to state schools or independent schools such as Seaford College less than a 20-minute drive away.

It was initially proposed that Seaford's junior school and St Margaret's would merge but the plans fell through and closure was inevitable.

[1] In July 2009, hundreds of Midhurst locals and former pupils gathered at the school compound for the farewell ceremony.

[3] The Sisters continued their presence in Midhurst after the school's closure.

This West Sussex school or sixth form college related article is a stub.